People of the internet usually go by "anonymous." There is no singularity on the internet, only anonymous as a whole. Alternatively, you can call them "faggot," but people who are gay and such tend to not like to be associated with the horrible people who post pictures of their penises pretending to be gay.
If you somehow sort out all the clean, sane people off the internet, then you are left with a big coffee filter filled with all the horrible people of the internet- aka 4chan.
4chan boards and their users go long beyond "op" and "retards who reply to op, keeping the troll feeding cycle alive." Some boards even have their own monikers, no doubt you've heard of a /b/tard. But have you ever heard of a /fit/izen? Didn't think so.
/ck/ is the cooking board. /ck/ could be the ck in cooking, or it could be the /ck/ in cock. Nobody is sure. All I know is that rooster is a lot less appetizing than chicken (which also has /ck/ in it.)
Artwork and critique is /ic/ as in "I c wat you did there." Buahaha.
Fashion is /fa/ as in fag. We could have figured this out already. Not all fashion lovers are necessarily fags, though.
Travel is /trv/, and although it's like a really, really huge stretch, it might stand for 'transvestite,' just because it's a really interesting experience traveling as a transvestite, with the whole pat downs at the airport and such. You never know where they might go to find a bomb- they might end up with a completely different package.
Not that I have any experience in this.