The guy was a dirty old pervert, naked in the shower, in the middle of a sex act. Your speculations that he could be hiding a weapon are ridiculous. Where, in his bum?
As for using the boy as a shield, etc, it’s just inane speculation that doesn’t fit at all with what we know about Sandusky and how he responded to similar situations. The man was caught in the act of molestation three times. In two of those instances, he knew he was spotted, but the witness didn’t confront him, but in the third he was confronted, but he managed to talk his way out of it. He had also been able, apparently, to successfully talk his way out a prior police investigation. Therefore, his behavior demonstrates that if McQueary had confronted him, he probably would have tried to talk his way out of it again, instead of using the terrorist/bank robber tactics you are speculating about.
Sure, McQueary was in no position to know that about Sandusky, so maybe he would think Sandusky would hurt the child if confronted. However, Sandusky was already hurting the child, and by walking away, McQueary pretty much guaranteed that nothing would stop Sandusky from doing further harm to the child that night. So, he chose to allow that harm to continue instead of making even the slightest effort to stop it.
If that qualifies as a smart decision, it can only be viewed as a smart decision regarding McQueary’s self-interest, and even then, knowing what we know now, it was extremely stupid in the long run.
Read. He himself could have easily been the weapon, the shower walls a weapon, or anything that he may have taken in with him...even a wrapped towel.
And you just said yourself...”probably”...talk his way out
Go call someone elses “speculations” ridiculous.