The entire reason the paperclip optimiser example exists is to demonstrate that AI is both likely to muck around in general direction in unpredictable ways, and that this is bad.

Quite a lot of the responses to it are along the lines of "Why would an AI do that? Common sense says that's not what anyone would mean!", as if bug-free software is the only kind of software.

(Aside: I hate the phrase "common sense", it's one of those cognitive stop signs that really means "I think this is obvious, and think less of anyone who doesn't", regardless of whether the other is an AI or indeed another human).