But they can fly a plane that detects Starlink signals (...I presume, I don't actually know how it works) and target the areas that have them.

But that's an escalation, it's better to talk about it first with the party in question, if they don't answer there can be further legal recourse. International law and -lawsuits are a thing.

But this comment thread sounds like reason and legal systems aren't working, and suppression and military action are the only recourse left. I mean to a point I agree, but at the same time we (as humanity) are not (or should not be) savages.