I can't believe that there is that much cheating going on in this hobby. It's very disappointing to hear this.
I guess I assumed most guys had a "wide eye innocence of youth" view of MF/EF. That is way to serious for me. I hope that the cheaters are few and far between and that they are called out and banned from various league and tournament play.
As far as weight limits are concerned, I say let the teams make weight anyway possible...as long as they don't go over the league/tourney limit. Personally I find the heavier players run better on my big board. I like a little speed in my games and some bases just can't cut it without the additional weight. Michigan Joe showed me how to weight bases a while back and it has improved my teams play. I'm still working on my tweaking skills (that's another story altogether) but the combo of proper tweaking and a little weight has made this hobby a little more enjoyable for me.
DC