Again you're making conjectures and not sticking to facts. The only person attacking a person oppressed by the CCP is the MuseScore developer. He's also the one threatening to involve the CCP. And you're being an apologist for them. It wasn't an alert, nor an attempt to make the plugin legal. The
"Otherwise, I will have to transfer information" is a pure and simple threat. And you're the one making excuses for that behaviour.
If this is a real threat then MuseScore really handled it the worst way possible and they should be ashamed for purposefully threatening to endanger a CCP citizen. If it's not, it's just a mafia-style shakedown.
Once again: if you don't see a problem with calling the CCP police on someone whose only personal information we know is that he's anti-CCP, then I don't think we have enough ethical common ground to even continue this discussion.