Some good ones already covered in the thread.
1. People who comment on their friend's status with something completely unrelated e.g
Was wondering if anyone has an old ipod I could buy?
"Gaun oot tha nite m8 for sum shandies lol???"
2. Short and vague posting designed to get lots of friends to reply e.g
Oh well guess u never kno who ur real friends are!!
Cant wait for this day to end
The replies usually look like...
"Whats up?x"
Or
"Luv u xxx"
3. Mark the special occasion of going to the garage or any other generic club by taking 30+ pictures in which the girls all make same face.
4. Anyone who has less than five hours sleep simply must let everyone know how many hours they have slept.
5. Pretty much everything posted on facebook before, during and after Old-Firm games is annoying.