My two kids are arguing at the dinner table. Driving my wife, me, and their grandfather mad. The living room has a 'room' sort of attached to it, but no door, just a window into it. It's accessible via the kitchen. We call it the 'back room' . I say maybe we should annex them in the back room and then get crucified by my wife and her dad for improper use of annex as it means to join and not to split. I get that, but I felt/feel that using annex in the context I described was OK.
If you have a group of people and within that group there is a smaller group of people you want to separate but keep close, (i.e. two annoying kids), is it fair use of English to say we should annex them?