The cybro solution is simple. Command the boat he is on (he rarely has the rank to take it back) and move the boat out of harm's way. He will of course shift to another boat, but then rinse and repeat. If there are a couple of players annoyed enough and diligent enough to keep his boats out of flash range of anything, his fun will probably be less and he might go annoy another team.
Will the boat(s) he messes with no longer be strategic assets? Mostly. But they pretty much aren't anyway, with him on board. So why not?