i have.. there is no way the safety engages by itself. This is highly unlikely. In fact, i have one of the first shields that automatically came with a safety. Been carrying it for years. Never happened.
I sometimes use my safety to reholster when at the range etc... especially IWB carry. Don't have too, just do.
i also carry a kahr without a safety so i know what carrying a gun is with and without. The simple fact is, the safety on the shield has never gotten in my way. I usually recommend new shooters or new individuals to CCW chose a safety.
