Facebook has so many peeves it's not even funny.
Stop telling me every small detail about your life, I don't really care what you had for breakfast.
Stop poking me, if you havn't realised after all these years that I won't ever poke you back then get off facebook & concentrate on getting an education.
Serial likers, i'm fine with people clicking on the like icon but certain people like everything, are they stalking me or do they have OCD? No-one likes everything for petes sake!
Debating on face book, to be fair i've had many stimulating debates on facebook over the years but i've had far more mind numbing debates.
There are certain debating tactics people employ on facebook (& most forums) that wind me up.
Mis-quoting, certain people will take part of a sentence out of context & try & twist your meaning or subtly change a word or two when they quote you, I simply point out that if they can't quote me accurately then i'll not waste my time with them.
People who ignore rational posts, you can have half a dozen people making rational valid points & one person posting rubbish, the valid/educated points will be ignored & the stupid one wil be used to justify someones point of view even with pages of well researched evidence to the contrary.
Spelling police, just because someones spelling isn't perfect it doesn't invalidate their point.
People who take no reply as a victory, some people spend all day on facebook, others only pop on for an hour a day (like me), i've had debates with people & thought i'd gotten through to them but when I log on the next day I see a post from them that as I didn't reply at 3 am they won the debate. You didn't win the debate, I just had to go to bed to be ready for work (that's the thing some people do when not on facebook 24/7)