Down here in Australia, flying the Aus flag in your front yard/garden is generally a sign that you are a red-neck bogan ‘patriot’, hell-bent on keeping ‘others’ out.
What’s the deal in your country, wherever you live?
In the US; if flown in the yard there is good chance it is MAGA.
If flown from a truck or boat, it is beyond doubt the very worst sort of MAGA.
Same in Spain, same in Catalonia, same in the Basque Country, same in Germany. Nationalism, put out for show: the last refuge of a scoundrel. Samuel Johnson, 7 April 1775, so no news here.
I’m quietly amused by a flag-flyer on my morning doggie walk. Amidst a whole lot of Aussie flags flown at full mast, he sometimes flies flags of different colours, which causes me to google them when I return home. He’s flown French, Italian and Bolivian flags, perhaps as a passive-aggressive protest against the bogan flags. I love it 
In the UK, flying the union flag or (in England) the flag of St George is fast becoming a sign that you’re a far right “patriot”. We also have idiots who put flags on lampposts and paint roundabouts - we call them flagshaggers. Definitely not the kind of people you want next door.
In Norway, it’s common to fly the flag on national flag days and other occasions that deserve it (e.g. birthdays, baptisms, confirmations, weddings, burials etc. in the family). If you have a flagpole, you fly a normal flag, if not you may fly a balcony flag or something similar. Last Friday, when our King died, a lot of Norwegians flew the flag at half mast also on private properties.
It’s not legally required, but considered common curtesy, to follow the regulations for flying the flag on public buildings. Like, hoisting it at 0800 in the summer months and 0900 in the winter months and lowering it at 2100 or at sunset, whichever comes first.
If someone sees a flag flying at your place and it isn’t a national flag day, they’ll assume that you’re having a baptism, wedding, birthday or something like that in your family. Flying the flag outside national flag days or such occasions is almost unheard of and would be considered seriously weird.
Meh. This is horseschmidt.
All sorts of people fly the flag. A lot of older houses were built with flag poles on the front.
My neighbor flies the flag on a pole in his front yard. He is anything but a MAGA member.
It could also indicate that you’re a child! When I was a kid, I stole a long 2x2 from a construction site and carried it home on my bike. I carved the upper half into a cylinder shape, rigged it with ropes and a pulley. and somehow (don’t remember how) planted it in the ground in our back yard (not front yard) and flew Canada’s then-new flag because I thought it was cool.
Here in South Africa, literally flying the flag all the time at home would be considered weird. I mean, I find the very idea of private homes with flagpoles super-weird.
Flag ribbons, pins and stickers can be quite common - it’s quite a colourful, eye-catching design, after all.
But literal flag-flying is not a big thing (outside of major sporting events, of course).
However, there are a minority who fly the old (Apartheid SA) flag, and it’s exactly who you’d expect in that case. Although these days they have to be very careful how they do so…
Yeah, very unusual. We’re MUCH more likely to see a foreign flag or sports team flag flying. And even those are rare.
We do plaster our flag on all sorts of merchandise to flog to tourists, but I have yet to see g-string underwear with the flag… like I did in the UK with the Union Jack.
Flying the flag on your own property is pretty uncommon in England. We don’t too worked up about the flag here, and in any Internet discussion about the flag somebody will probably pop up saying, the flag is shit, we should change it for something more modern.
There aren’t many US flags on our street, but both of us also have pride flags. Down the street where I walk, there are two full-on MAGA houses with flagpoles. Well, flagpole since one of them snapped in half in a windstorm and he’s been left with just a hole with some ground cover around it. Sad!
So, a mix here in our MA neighborhoods.
Speaking just for California, it used to be mostly mid-century veterans (WW2-Vietnam) and John Birchers with the flag poles in their front yards. Popular culture has been using the practice as a signifier of hyper-patriotic, politically deranged characters for, at least, half a century. I can’t imagine any one doing it now unless they don’t mind the assumption they are aligned with the MAGA movement.
I disagree that most flying the U.S. flag are MAGA, at least this isn’t true in my part of the country.
My opinions on the repercussions of assuming only MAGA people fly the flag are better suited for another topic.
Many places in the US go flag-crazy on Independence Day (the fourth of July), regardless of political leanings. And the bunting at special baseball games is often flag-themed, again just for the sake of hoopla, not really a political statement beyond “let’s eat some hot dogs.”
There is a big difference between showing the flag on your front porch on special days and erecting an actual flagpole with an bedsheet-sized old glory in the middle of your yard.
my contention still stands. It depends on your area.
Not always, but it’s a little sus (as the kids say). 
Lots of the flagshaggers around here will add a Gadsden, Trump, or Confederate flag to help you out.
The mere presence of a US flag on a flagpole isn’t enough to indicate MAGA IMO. When they add a thin blue line flag it starts to teeter in that direction. Gadsden flag is a fairly clear indicator, although it wasn’t until the Tea Party started to become a thing.
When I was growing up displaying a US flag on national holidays was nearly universal. It became less so as the WWII generation died out. I still have one and put it out on Memorial Day, Independence Day, and Veterans’ Day. Also, flying a US flag or yacht ensign (basically a Betsy Ross flag with a fouled anchor in the center of the stars) on a boat is common practice and I’ve done so on every boat I’ve owned (except for dinghies, canoes etc.). Flying one on a vehicle is a sure sign that the owner is a MAGA moron (and personally, the irony of violating flag etiquette makes me laugh).
I think lots of people of all stripes fly the US flag at home, though I think they are somewhat more likely to be MAGA. Fly on the back of a pickup truck and you are nearly certain to be MAGA. Flying on a boat tells me nothing, plenty of people did that pre-MAGA.