Oh let’s not forget the lord and savior of exploits Fancy the Famous Bard. There was a “no rules” Good vs Evil PvP server and 80% of the server was evil. The only rule was level 5 and lower could no be attacked by players.
Enter Fancy who would stay at level 5 singing Selo’s so he was faster than all the mobs and then train groups of mobs into the bad guys, aka, evil team players. There was nothing they could do to harm him in retaliation because there were no rules, training and briefing was allowed and he was under the PvP level limit.
After enough complaints, they changed the rules and removed the level 5 PvP limit in mid/high tier zones. All because of one Fancy bard supporting the good team.