3 strikes your out...
You don't really need it. If you think you do, your penalties for the three infractions wern't severe enough.
Basically, if your penalties have a significant impact on the success of the team that the player is on, teams will self-regulate out problem players for the simple reason that they won't want to risk losing because one of their players can't behave themselves. Either the players will modify their behavior to get less penalties so they have a chance at winning, the problem players will get kicked off the team, or their continuing lack of success will cause their funding to evaporate. (Well, the last would never happen, as the mere threat of it would get people shaping up in a hurry.)
Even if just existing NPPL rules were rigorously enforced, I think that would make an immense difference in the behavior level at the events.
I also think there will be a bit of a social effect - NPPL seems to be doing some very significant advertising that they won't be tolerating BS. That both sends out a message to current players in advance, and should also attract players who share the same philosophy and are not currently attracted to national-level tournaments. If you have a bunch of customers who demand what NPPL is promising, the league becomes motivated to provide it lest they lose those customer's money.
This is actually something I'm watching rather closely. As the head of a league where cheating/behavior problems are nearly nonexistent, and a league that despite severe obstacles to growth (eligibility requirements) doubles or triples in size each year, I've long been saying that there are a LOT more customers out there to be reached by offering a clean, fun game than there are to be reached by tolerating poor behavior. This is looking like it'll be the experiment to see if I've just been blowing hot air the whole time or not.
- Chris