Got my first Glock (a Gen 2 19) in 1988 and one of the reasons was that they are designed not to go off unless the trigger is pulled. I alone control whether the trigger is pulled when the weapon is under my control (which it always is). They even tested drops from tall buildings. You could literally drop a loaded Glock from the Empire State Building with one in the chamber and it wouldn't go off. There is a physical block between the striker and the bullet and the striker is always only half cocked...until the trigger is pulled that is.
Anyone who knows me knows I love Glocks. That being said, I don't and won't open carry Glocks. I will repeat again an experience my friend had while a cop in the Dallas, TX area. He carried a Browning Hi-Power with manual safety. During a domestic dispute my friend had to grapple with the husband. While doing so, the wife pulled his weapon from its holster, aimed it and squeezed the trigger. If it weren't for the manual safety and the woman's lack of training or knowledge on how to deactivate the safety, my friend would be dead or horribly injured.
I have nothing against people open carrying, in fact I really like it and encourage it. I rarely if ever open carry because in the words of my friend referenced above, I do not enjoy being a "walking gun rack". When I do rarely open carry (just in support of open carry meet ups), I carry a Smith and Wesson 645 with safety engaged, hammer down with no bullet in the chamber. Then if something bad happens or someone snatches the smith I can quickly draw my Glock.
A man's life, liberty, and property are only safe when the legislature is NOT in session. Will Rogers