Rule Suggestion: No tp'ing or logging from PVP

I’m suggesting this rule because me and my pvp groupies recently lost many sets of armor to an unfair pvp battle against a party of two people.
Basically what this means is that if you attack someone, you have to go through with the fight, and tping/logging out would result in a warning or ban.
Of course if you’re being attacked, you should be allowed to fend them off until you can tp away.
But if you’re being attacked, and you decide to try and fight the guys to the end, you can’t just tp away when you’re down to low hearts, especially if you have diamond armor (in which you should have enough time to decide if you want to fight them or run away.
This rule wouldn’t apply to actually running away from pvp (sprinting away)
The reason I think this should be enforced is it is unfair to victims, who would otherwise hand out justice to their attackers, and the attackers themselves, who would otherwise loot the brave victim. This is also a towny oriented server, and it should be common knowledge to everyone that you have to watch your back in the wild anyways.