This may be of interest to you.
http://www.lesjones.com/posts/002437.shtml
From the article:
"A Tennessee Highway Patrolman accidentally shot himself in the leg when he re-holstered his gun following a foot chase. He's in stable condition... The THP issues Glocks, so I'm 99% that's what he was carrying."
"Of course, I can't be sure the installation of a NY Trigger would have made any difference in the foregoing incident. However, in my informal tracking, departments with NY triggers installed on their Glocks consistently experience fewer accidents than do those with standard triggers. If you own and carry any Glock pistol for serious purposes, it is my recommendation that you install a NY Trigger without delay!"
A better option would be to “KEEP YOUR FINGER OFF THE TRIGGER UNTIL YOU ARE READY TO SHOOT, IDIOT!” as my DI father taught me.