A question for our gun users

[Dilloduck]

Mechanical failures. Wear, faulty assembly, damage or faulty design of the firearm can cause it not to function as intended. For instance, a safety may have been worn down to a point where it is no longer functioning. Broken or worn parts in the trigger, sear or hammer/striker may have given the firearm a "hair trigger" (a very sensitive trigger). A dented or bent body of the firearm may cause jams or premature discharge of ammunition. Sensitivity to impact may cause a firearm to discharge if dropped or struck against another object.

http://en.wikipedia.org/wiki/Gun_safety

I would never trust a safety.

Or your "friend" for that matter