Tried it. Took only a few extra script lines. Really funny. Your uav defrosts enemies with hacker but as far as you know... unless you keep track of names or see it happen... its a friendly. You even get points so it doesnt tip you off. To work, if I did it right, you need to have hacker the moment you are frozen. You cant change loadouts while frozen and be defrosted.
I will put it on the test server today so people can join and test it out to make sure all is good. If so I will add the script additions to the main sever. That also will need testing with a full crowd in terms of gameplay and how many will use the perk and when. Like how combat medic and simply extending spawn protection had its own effect. So if its late in the game, and your team is losing, how many will get hacker instead of hardline. Considering the enemy cant shoot down their own uav. It would be an interesting choice to see in action.