I think it's more likely to make POV warriors use sockpuppets and thereby force other editors to either let them get away with it or risk being blocked. Nobody likes to work, but POV warriors are generally more willing to work.
Further, the way I interpret the 3RR, if there were 2 different POV warriors, each reverting to different POV versions, an NPOV warrior would lose. Consider the edits:
original version: Jerusalem is city which is claimed by both Israel and the Palestinean Authority. Warrior 1: Jerusalem is a city in Israel. you: Jerusalem is city which is claimed by both Israel and the Palestinean Authority. Warrior 2: Jerusalem is a city in Palestine. you: Jerusalem is city which is claimed by both Israel and the Palestinean Authority. Warrior 1: Jerusalem is a city in Israel. you: Jerusalem is city which is claimed by both Israel and the Palestinean Authority. Warrior 2: Jerusalem is a city in Palestine. you: Jerusalem is city which is claimed by both Israel and the Palestinean Authority. Warrior 1: Jerusalem is a city in Israel.
In this scenario, the person restoring the NPOV version has broken the 3RR, but the POV revert warriors have not. Sure, you can try to get people on your side, but it takes more than twice as many people on the NPOV side as it does on the POV sides. Add in a few vandals who put in "Jerusalem sucksorz!!!!" and give a few of them multiple IP addresses...
I think the 3RR is a great guideline. In fact, Jimbo has convinced me to limit myself to one revert per day in almost all cases. But to be a strict rule, I think it has to be perfect, not just good.
Anthony
The 3RR doesn't have to be perfect, IMO, it just has to be better than what we've got now. At least this will make POV warriors hav eto work more to fight their revert wars, which should help reduce their number. Nobody likes to work :).