Isn't the phrase Evil Maid a bit off-key? I'm sure this must have been discussed at great length elsewhere. We could express the same idea without the power and gender relations implied.
It's the common name of the attack that people get. So it's useful whether PC types, who are a tiny minority of many audiences, like it or not. I'm not sure how "Evil Maid" label was derived. I do know from espionage reading that the most common form of the attack came from maids in hotels of business or government people passing through. Janitors and maintenance types, too, but they were in a trusted, protected building instead of a third party's. French intelligence is particularly notorious for using maids or other hotel employees. Calling it a (adjective-here) Maid attack given all the maids involved makes since for historical and current significance of that attack vector. As in, the label is also a reminder to watch your ass and never leave gear unattended in hotels. ;)