Yonni: the point system is good for not having beginners in high pot games. Usually NMR do not occur above 1000

pot size. All that said, sadly they do occur sometimes.
Rules without punisments and enforcment are no rules at all. This applies in every aspect of life. I think, when you joined a game, you have undertaken the responsibility to play according to that game's properties (phase length, etc)
If this responsibility is not enforced, then it's not a responsibility. On the otherside it wastes a lot of time from 6 other people's life.
Personally, seeing NMRs and continuing games for a couple of phases until it ends somehow make me angry only, and definiately takes away the joy of game. The best way to avoid those players in the future to take away some points from them.
Or to ban them for a few days/weeks to join ANY games. I'm open to any solution, but I think the behaviour must be address some way.