[Bob Marley] 'Exodus! Movement of the people. [/Bob Marley]
In my home town of Buffalo circa late 70s/early 80s, there was a train bridge overpass (long since removed) that had two things scrawled on it:
“Elvis Costello is GOD”
and
“Oh my Elvis Costello!”
I know that building! I never knew about the battle, though, despite all the times I passed it. That’s hilarious.
There’s a slightly longer copycat of that too.
Boarding school bathroom stall:
Flush hard. It’s a long way to the cafeteria.
Romanes eunt domus!
Another oddity in Belfast, when a lot of gable ends are fully of crap like this it’s nice to see something a bit different like this 
Hee hee hee…humps for one mile.
On the condom dispenser: “This gum tastes like rubber” 
Not the bestest but something that has stuck in my mind after all these years though I can only remember the translation now not the original Russian.
Seen everywhere in the Soviet Union of communist times
Above the Hammer
Below the sickle
You still get screwed
Whichever you choose
There was a famous piece of graffiti on a motorway bridge on the M1, headed northwards.
It’s grim up north
The signs on the M1 quite often do not give directions to a town or location, just a direction.
During the depression of the 1980’s, when UK industry all but collapsed - this hit certain regions disporportionately hard, and it seemd that the government of the day didn’t care, and was solely concerned with ensuring the city traders made their money.
This was then taken up as the title for a song by the KLF.
I always thought that this graffiti was around five or so years older than this headline, however when one finds a cite, one has to accept the evidence.
You forgot the classic rejoinder: “Oh, but what bubbles!” 
We have streets signs here in neighborhoods that proclaim “SPEED HUMP.” To me, that sounds like an Olympic event! 
That’s great. And is that sign in Cincinnati? 700 WLW is based here (but it is broadcast all over the place).
Ideally, I think the best graffiti is no graffiti. What do you suppose the ratio is between “good” graffiti to obscenities/gang tagging?
That doesn’t mean I don’t appreciate a humorous non-sequitur, wry observance or witty turn of phrase. This one has been in a campground bathroom in Zion NP for years:
The Blind Owl Sees All !!
** ^…^
/ o,o
|) :::: (|
= w=w=**
[reply]
Who?
Слева молот, справа серп
– Это наш советский герб.
Хочешь – жни, а хочешь – куй,
Все равно получишь хуй
Sleva molot, sprava serp
- eto nash sovetsky gerb
khochesh’ zhni, a khochesh’ kuy
Vsyo ravno poluchish’ khuy.
To the left the hammer, to the right the sickle
- that’s our Soviet emblem
[whether you] want to reap [or] want to thresh
All the same you’ll get dick.
I sometimes saw this last word replaced with khleb - bread, which was even funnier, since given the strict rhyme scheme of the four-line chastushka (Russian limerick), you know what should have been coming.
If nothing else, the graffiti was better under the Soviet Union. Now it’s mostly misspelled English (“Fak off” is popular") or lame sports boosterism (Spartak - champions!)
Late one night when I was a law student at UNC-Chapel Hill, my gf-of-the-moment and I snuck into the women’s stalls to see an on-going seriesof graffiti. It started like this:
A women needs a man like:
and followed through 75-100 answers. I think this was the first time I ever saw the ’ Like a fish needs a bicycle.’ answer.
If you give a man a fish, he’ll want a bicycle.
I’m surprised that nobody’s mentioned Banksy