I',m sorry,a cocked and locked 1911 will not go off if you hit the trigger,and it can't go off reholstering even with the safety off because of the grip safety.
A search and investigation of Glock ADs (not NDs) will show up many with no finger involved.A collapsed holster,the Serpa with debris in it,etc.,etc.The OP does S&R which could very well pose circumstances that a reholster could do this.It would suck if you,re searching the woods and an animal threat stops,so you reholster and a stick in the thick brush you're in boots one down your leg.
A LEO was exiting his car and smacked the grip of his Glock on the wheel,discharging the gun-I don't recall if he took it or missed his leg.An investigation came to the conclusion that the piece of frame that was breaking off had wedged in the right spot and when the grip hit and twisted the frame it tripped the striker.Don't know,don't care.Many agencies have left the Glock.A year or 2 ago a Canadian (I believe) department had problems and was printed in a mag or paper for that profession.Glock immediately threatened to sue them and it majically disappeared 2 days after I saw it-no trace of it searching everywhere,HMMM.
The design is not great,the safety is in the trigger so why have it at all?There's a FP safety as far as I know so the the trigger safety is unnecessary if dropped,it's marketing hype for the ignorant.For decades Glock was known to have unsupported chambers and many KBs in some 9s and the 40s and it took them quite a while to remedy it because they said it wasn't their fault,it was user error.They would also KB when light connectors were used in some guns because the the slide and trigger bar rubbed the last of the pull and started pulling it out of lockup,unsupporting the case even more.I've been around since before Glock started and have seen documented cases of this and more for decades,sorry.If you think the gun is the greatest thing since sliced bread more power to you,I prefer better designs and quality.
Now,alot of the ADs are really NDs that are trying to pass it off on the design and are proven so.Alot of reholsters are from a finger,the weapon wasn't clear before disassembly,etc.Happens all the time with any gun design.Things happen in situations where your main focus is on something else over reholstering and this is where the Glock fails,there is no possible way for my 1911,HK or Beretta 92 to go off reholstering so it's one less thing for me to worry about.

