While cleaning up electric, I noticed that there are an engineering tag. On a website whose title is "Electrical Engineering", that's a strong candidate for an intrinsic tag, i.e., one that carries no information, because every question could carry it.
Current state is 116 questions, of which 20 are currently closed, non-deleted. That's not a great quota, and is as it seems a result of that tag to have a high likelihood to be used when people actually ask off-topic, non-technical questions.
So: let's blacklist that tag!