Also on a RP server, generally, there isn't any OOC talking, (Out Of Character) so global chat shouldn't have any RL issues going on, like how to rebuild a engine or why SLI is better than Cross-fire etc etc.
Another I have noticed about RP servers is you get alot less people playing toons with off-the-wall names: Example - (Sloppyjoe, Beef-curtains, Vagisauras. etc etc