I'm not fond of Glocks and believe they're inherently dangerous pistols. I have a S&W 659/5906 that are true DA. One of the greatest, most important handgun safety rules is to never touch the trigger until you're ready to fire. This is exceptionally important for Glock and other striker-fired pistols, but admittedly less so for Berettas, Sigs and S&W second- and third-generation pistols, as well as most revolvers.
I would NEVER cock my 659 and carry it that way, so why would I carry a Glock that is, if I didn't have much smarter people than me to tell me better, cocked and ready to fire.
But wait, says one, it does have a safety! Oh, really...where?
Well, it's on the trigger!
Wow, that's a safe place for it! How does that make it safer than my cocked S&W? My Smith at least still has some travel in it even when cocked. It probably would have kept me from accidentally shooting the driver of a car, like the Glock-weilding police officer who forgot the cardinal rule of keeping his finger off the trigger until ready to shoot. With Glocks there can be no lapses in judement, no mistakes. The gun is always ready to shoot, the same as any single-action pistol or any cocked DA pistol, and there's no luxury of travel in the trigger. (I'm sitting here with my cocked, unloaded 659, and I still have enough travel in the trigger to make it safer than a Glock. I'd still never carry it cocked, but neither would I carry a "cocked" Glock auto.)
Accidental discharges have skyrocketed in police departments and agencies who have switched to Glocks and similar arms, and though I don't object to the rule about keeping one's finger off triggers until ready to fire, that rule is far less relevent to those of us with DA revolvers and autos.
Glocks, in my opinion, would be much better guns if they had safeties and some travel in their triggers. In situations where I may need my weapon in an instant, I probably would have my finger on the trigger if I were using a DA revolver or my Smith auto. I certainly wouldn't if it were a Glock.