[nynx]

Depending on what kind of software you tend to work on, you may have written a lot of subtly incorrect C.

[varispeed]

Yes, I've done fair share of these, but I don't see them as different from any other incorrect code I may write. I agree that sometimes it may be more challenging to debug, as it may not be immediately obvious that e.g. I am writing memory I am not supposed to.