.. if you are RP banned (either it was your choice or their choice), you cannot interact IC or OOC with that person anymore. No swearing. No talking to the or behind their back. Absolutely no offensive language. If you start to collect many RP Bans you should also look yourself at the mirror and try to figure out how you can improve your attitude in the game, maybe?
Read here too:
http://community.socionex.com/sim-rules/admins/rp-bans-faqs/