The only acceptable ones are:
c:
:c
:(
:) (generally only sarcastically)
:D
xD (pushing it, and NO CAPITAL X EVER NO)
._. (pushing it also)
:P (pushing it also also)
if you use :3, ^_^, 3:, XD, >_> (variants included), or any other dumb weeaboo emoticons, you should be forced to either apologise to everyone around you or be brutally assaulted with a machette
in fact i should avoid this thread before i tuber. allergies, you see.