There's a reason why we get anal about the tools. My step-son was so bad about the tools and mess that I stashed my Craftsman sets (bulk package) before he really got into working on his Ricer Mustang. Everything he touched got trashed, scattered, and/or lost. The tools he did use, like the allan wrenches, screwdrivers, misc sockets that weren't in sets, have all disappeared.
My garage was already pretty messy as it was; I just spent a week sorting out piles of crap from the junk I haven't brought myself to throw out yet. I found maybe a quarter of what's missing; the most used tools are gone though. I'm just glad I stashed my good stuff when I did. He's moved out now, and his dad bought him his own set of tools, so I think mine are safe now.