I hate to sound an ageist, but Facebook was at it's finest when it was for students only.
Now I get my 16 year old nephew posting the normal "you don't care about cancer if you don't share this", the mid 30s activist posting about health care or any other election related nonsense and of course, my grandma adding my friends as her friends and commenting on their status updates, or posting 30 photos a day. Or my mum and her mates having a fucking conversation on comments instead of PMs.
Oh, and don't start with the "Don't accept their adds" thing, because if you don't accept someone's request or like their post within 20 seconds, they will hate you for eternity. It's become absolutely absurd.
Edit: Oh, and the absolute worst is the 'if you don't like this post, then facebook will charge you' drivel. Get out of town.