Sometimes I do, sometimes I don't.

I did it at work once and it was because some guy STOLE my work without giving me credit. Even worse, since he didn't know how to use it and I said i genuinely didn't have time to help him, he told my boss that I let him have it and that I didn't explain anything to him about how to use it. Then he wanted me to fix HIS problems, when his problems were centered around the fact he stole something and didn't know how to use it. I flat out said, "I never gave him anything. I also don't even know what he is trying to do because he never told me he took it in the first place. He just told me he had problems trying to use it, and that's when I know he took it. So I couldn't help him even if I wanted to. I'd be glad to help, but I would appreciate it if I was told someone was using my work."