A few decades ago everyone got very worried about "drop safeties". In the glock, the firing pin safety in the frame is familiar to all of us. The striker cannot go forward unless the trigger is pulled. Some guns can go off if they have an inertial firing pin like the 1911 if they are dropped on their muzzle.
However, in the 1911, if you don't futz with the firing pin and firing pin spring, I've never heard of or read about a 1911 going off if dropped. One guy even went to a lot of trouble dropping an assembled slide with a case with primer but no powder loaded and I think he had to get to like a drop of 20 feet to make the primer fire. The untold millions of service 1911's never had a firing pin safety. As I mentioned, Springfield Armory still doesn't use them, and I think Colt you have a choice of with or without. So, at least in the case of the 1911, the FP safety was a solution in search of a non-existant problem.
Now, I'm not sure one could not fiddle with the 1911 enough, changing firing pins and springs to make it not drop safe, but the original design is. So the FP safety was added to many 1911's in the craze in the 80's and 90's. Back then people actually wanted the Series 70 guns - no drop safety.
So, while back then, Mas would tell me I was nuts for removing the Swartz safety (that's just the name of the inventor, it was supposed to be a better approach to the FP safety at the time) if I used the gun defensively. That just never made any sense to me. "I did not drop the gun and it went off and killed our deceased choir boy, I was in fear for my life so I pointed a loaded gun at him, and intentionally pulled the trigger, putting two in the HVAC and one in the CPU, your honor." Anyone making an issue out of the firing pin safety when the 1911 never needed one, did not have one for 80 years, and many don't have them today would end up looking a little foolish if they brought it up, I reasoned.
Again, it's a matter of degree. Use one of those scary bullets posted above, that's prolly not smart, putting a Punisher slide cover plate on your gun or engraving, "Kill them all, let God sort them out" are prolly also not smart. I'm convinced my removing the FP safety is a non-issue, but others will disagree. I just cannot figure out if using a PMF would cause enough of a problem to be meaningful. It is a media created problem, but the media is great at scaring the shit out of a lot of people.
I'm twisting in the wind over this one.