Graybeard, I have it on good authority from folks on the S&W forum that a dropped S&W with the lock CAN lock up by itself, and has done so. Were that to happen to me, during a serious social encounter, I believe my widow would own a large portion of Smith & Wesson, following the successful conclusion involving a bunch more lawyers!
Hey fellers, how about a class-action lawsuit against S&W for screwing up their product line in the interest of Political Correctness?
Meanwhile, I'd avoid pitching those keys.....you might need them whether you lock the gun or not!
Papajohn