I think that there should be different Tournaments for different skill levels for example a tournament were only pros can join and one where only adapts can join.

can easily be abused by people resetting stats and intentionally keeping their rank low.

good point

not a new idea:

http://www.funkysnooker.com/thread/7654/fairer-tournaments/1

thats recently but over last year there has been 3 or 4 threads about this