Hahaha! I spent the morning explaining to a network installer who bought the wrong jacks and tools for the project that I wasn't going to keep the incorrect jacks and pay for the correct ones just so he wouldn't have to accept the return of "products that no one wants." Correct, no one wants them, me especially.

Don't work with incompetent people. Even if you set a low bar for success they'll just go and find a way to trip over it.