Here are some things some of those RPers do:
1. RP
2. Lag
3. Say, "boobs" or "****"
4. Spam you with invites
5. Steal your money
6. Ruin your reputation
7. Over-crowd
8. Rape
9. AFK
10. Look for people to marry (hey gurl like these abz? Well u can hav em if ya marry me)