People seem to forget that all the bats are compression tested before every tourney. If they pass they go in the bucket for use, if they fail they get thrown out. IMO the biggest difference Local and Conference tounreys equiptment wise is the balls. There's is a huge difference in performance whe compairing a ZN or Stadium ball to a .44/400, .52/300, or whatever lower compression ball that is used at the local levels. Is there people swingin shaved stuff in the conference???? No doubt, but there is a lot less being swung there than most poeple think. Shaved or not every bat still has to pass the compression test. The difference between a shaver that passes the test and one that doesn't is huge as well. I for sure hear a lot more more bazooka's in league and local tourneys because nothing is every tested there.
Regardless, even if they did all swing dirty bats like a lot of people assume. Then how come all the people swinging bazooka's locally in leagues and tourneys still dont come close to the abilities of the average conference player?