So what's the story? If you aren't cheating can a bat somehow fail anyway, in one of these tests? Wouldn't that be a huge waste of over $300 spent? I bet that would peeve some parents off that had zero intention of doing anything but play by the rules.
Yes your bat can fail for several reasons. cracks / damage, normal wear increasing wall flex or paint cracks, noise inside (rattle) from interior wall. Multi piece bats with loose handle joint. Most umpires inspect these areas the compression check will see if the bat has too much flex from normal wear, rolling, shaved etc.CF bats tend to get hotter as they are used and have the most flex right before they break. You do not have to alter the bat for this to happen a lot of normal use in batting cage, soft toss, hit stick,TCC sand balls, size strength of the player etc can speed up the inner/outer wall separation.
Most of the bats MFG the past few years are susposed to not exceed after break in or use but they do...