I haven't done a huge amount of PvP, mainly just with friends having a friendly match. I see a number of posts with, "running is bad", "you should wait and let the other guy recover....", etc.. Is there a post somewhere with the informal rules of PvP listed? Have I shot somebody after they exhausted all their skills? Yes, when two guys on the other team were silly enough to do an over-kill job on my team-mate, I came around the corner and blew them both away without a second thought. Is that wrong? I've started to run from somebody and done a quick reverse charge and shot them. Is that not allowed? I didn't call "foul!" when somebody shot me at the respawn point (although that strikes me as uber-cheesy and I wouldn't do it). I have even snuck up and shot someone while they were focused on my team-mate lurking around a different corner--bad?

I'd like to do more PvP, but I'm hesitant since I don't know all the agreed-upon rules. Help?