Actually, just one big one - the Seeker rockets. Each player is allowed to have one seeker going at all times. The target of the seeker is automatically determined, depending on the current gametype. This just flat out rocks for balancing out a game. It's totally cool to see a couple flaring birds swirling about your flag.
Seekers attack the enemy team without discretion.
I'll tell you what - there is no more mercy. It will find and punish you. This is the end all solution for the camper. No longer can you perch on high with a rail and a rocket launcher. Upgrade Quake 3 Arena with the latest point release.