[The Pack Knight]

Is a Glock safe, yes. Is a Glock less tolerant of a user screw up, yes.

I agree with both of those statements, though it's also worth considering that a pistol with a manual safety can also be pretty intolerant of user screw up when the user needs it to shoot.

[Kirkwood]

Less safe in hands of idiots like this.
http://www.stupidvideos.com/video/just_plain_stupid/Accidental_Discharge/#1299

Otherwise safe.