I unfriended just one person (IIRC) but I hide lots of silly bable, from those who think that fluoride is bad to those that think that global warming is going to kill us all tomorrow.
Perhaps it’s a generational thing (lots of older people are friends with just a few dozen people on facebook) but there are lots of people that I see socially that are acquaintances. I think I have somwhere between 700 and a thousand friends on Facebook. I don’t like many of them, they’re just background noise. But to unfriend them could have ramifications - they could be awkard next time I see them, etc. Like the weird neuroscience major who does crappy modern art and never hems his pants - I see him at one friend’s home maybe every other month. It would be awkward unfriended him.
There are lots of ways to hide things and have things hidden from you on facebook. It’s best to take advantage of them fully before defriending a person. 9/10, if you friended the person it’s because you have to see them socially or will have to in the future of they’re part of your “network”, so to speak. Unfriending them could cause you problems in the future.