It's the official pedophile wink. Child molesters use this smiley in chat rooms to attract their prey.
Pedophile: Hi there young lady.
Girl: hi :)
Pedophile: Asl? o_~ No pedo.
Girl: oh sure i give u, u look like trusty person :) smiley make u trusty. 12/f/new york
Pedophile: I come to your house now with candy. I just need your full address. o_~