I had some of my blades at work this summer for opening boxes n' stuff. One time this dude next to me needed to borrow one of my knives for something, so I gave him my Squirt. Moments later I found him trying to pry/unscrew something made of metal with the knife blade!!! I had owned the Squirt for merely a few days and already the tip was busted.
I basically NEVER lend my tools to fools anymore. One dude kinda broke my new Makita electric screwdriver/powerdrill (600 USD). He attached a wirebrush to it and tried to remove rust off of his car, pressing it sideways, so now it wobbles and won't make precision-drilled holes. Another guy wanted to borrow my new axe and I told him it was OK as long as he checked that the background was soft, so that he wouldn't bust it up. 10 minutes later he's chopping wood against a cliff! I tell him to stop, he tells me to f%&k off cuz he knows what he's doing, while he continues to chop and misses and takes off like 1cm of the upper point of the axe! I was like: are you really my friend? My brand new axe had to be resharpened and the process took away like 1cm of the entire bevel to get it's geometry correct again, which is like a lifetime of wear with correct usage!
So people must prove themselves worthy before I even consider lending them my stuff. They do get annoyed when I point this out though, but I don't spend hours of sharpening to hair-whittling so that some uneducated looser can ruin my work in just one single second.