Bat rolling is cheating. Breaking it in by hitting a lot might or might not do the same thing, but it wouldn't be cheating. Again, the great majority of the youth fp hitters I see have horrific swings. Spending money on hot bats and rolling them is absurd for most youth hitters. Mechanics, approach, patterning and the like would be the low hanging fruit by a long shot.
I agree with the hitting part. Without good batting, there is no bat that will help. With proper batting, then yes composite bats will make a difference, rolled or not. Everyone has their own opinions on this subject, and thats easy to see with discussions on different boards, and how heated it can get. I myself have expressed my opinion on it, I just dont think it should be considered cheating based on what it does compared to just hitting balls. I guess we can agree to disagree on this one.
Rob