A little button in your preferences that says "Toggle PvP Autoflag".
It's been standard issue in MMOs for five years, it prevents you from healing flagged friendlies or AoEing flagged hostiles by accident.
But this game isn't as advanced as WoW, Rift, or EQ2 in terms of game-play systems. It makes up for that by kicking *** in other areas, I think. People need to chill out, Rift was about the most bland MMO ever made when it launched, it was all systems and no flash but with devotion and effort from the developers it has evolved into a wonderful MMO. There is absolutely no reason TOR couldn't become something truly special over the coming months. Especially since it's working from a base that emphasises something that has needed more attention in MMOs since... NWN.