@Meki - The safety cap would only work if it required more than a click. i.e. you had to click and drag the cap up. I have seen a LOT of users who double-click EVERYTHING, EVERYTIME. It's like they don't even know they can single click. Of course I've also seen several people who don't know the difference between the left and right buttons on a mouse and just jam them both every time. Maybe they were Mac users in a former life...