5 minutes is too long, 1 minute is pushing it. The only reason people are proposing this is to combat the people who log on only to kill someone and logout immediately afterward. This gives the person being fired at a chance to find and immediately kill their aggressor. I say 30 seconds, tops. I mean, lets face it... The only reason people log in the middle of the fight is because they lost the upper hand. Since the upper hand is lost and they are exposed, you shouldn't need more than 30 seconds to find and kill him.