Use the Waves to knock them out and then door out of there?
I mean our entire reason for showing up was recon, we've reconned, sticking around makes no sense.
Also we could crush them like grapes with minimum effort, so giving them a chance to attack (and potentially hurt civilians) is stupid.
The one problem with this plan is them realizing that they've got our personal attention, which in my opinion isn't that much of an issue. If they know we're looking at them then they know they're doing something we don't approve of, and if they keep doing it or do something worse then we're going to come down on their heads like the wrath of god.
Our main ability, at least at the moment, is to be the very obvious and very visible hammer above these maniacs' collective heads. The more they fuck up and hurt innocent people the more likely it is that we drop down and crush them.
It's like a very demented game of whack a mole.