This: 'w00t LoLZz !!1111oneone!!!' is just someone trying to be a wanker (Y)
I do it now and again, people do it for loads of reasons, mainly over exaggerating typing errors hence the !!!'s turning into 11's, then someone will go another step and deliberately type 'one' afterwards. w00t and LoLZ etc etc is just a piss take of leet speak or '1337'.
Basically, just ignore it.
FS - Forsale
Wtd - Wanted
OT - Off topic
Erm can't think of any other things at the minute.
Oooh and:
PX - Part exchange or Planet X