Who is that guy or girl or whatsit that just gets under your skin just by typing a few keys?

Some classic rivalries:
jjgold< --> sickgambler
paco< --> lakerboy
fishhead< --> dumpster
daimo< --> posting populace
thremp< --> justin7
brock< --> gamblers anon
fosberg< --> USA
shari < --> grandmasterb
pavy < --> odds
brahmabull< --> lock threads
the prick < --> elementary education
BTJ < --> non capslock keys