I personally wouldn't hold Zemo's crimes* against them but the courts probably would. Actually, that creates some major problems for Mel because - while I don't recall her killing anyone - Screaming Mimi was on a LOT of villain teams so I'm sure they'd try to tie her to all sorts of things.

*Wouldn't his takeover be relatively bloodless? Everyone got hit at once with the broadcast. Granted, in a mind control scenario like that, I'd worry about planes falling from the sky or something but his thralls seemed to have some level of autonomy...except for Cap.