9. Someone at work tells you a joke, and you say "LOL!"
I was mortified to find myself doing that on the phone the other day.
The rest tend to apply too...except for No. 4, I have to say.
LabRat
Athos: If you'd told us what you were doing, we might have been able to plan this properly. Aramis: Yes, sorry. Athos: No, no, by all means, let's keep things suicidal.