Is heel toe downshifting bad for the clutch?

Answer:

It's not really bad for the clutch, however it does cause unnecessary wear-and-tear on the tranny, especially if you don't know how to do it very well. It also decreases your fuel economy as opposed to just clutching it or popping it in neutral and coasting to a stop. The only advantages to heel-toeing are that it sounds cool if you have a halfway decent exhaust, and that if for any reason you have to speed up to avoid someone or something, you are already in gear so it's easy to do so.