The US law Musk violated would be the Logan Act…

https://en.wikipedia.org/wiki/Logan_Act

If things get big enough that hobbyist instance owners are getting overwhelmed, it might be a good idea to organize a nonprofit, under the NPR business model. Not collecting data or breaking your brain with advertisements, though periodically, they’re gonna have to go hat in hand, and beg users to feed their Patreon. Hey, I’m more than happy to throw a little in!

Nice thing about this business model is that being a nonprofit, the point of its existence is to fulfill its mission (to help independent distributed social media thrive), instead of to make money for owners/shareholders.

Since Superheavy is still under power (center 3 engines, at 50%), maybe it just steers out of the exhaust before Starship lights the vacuum Raptors.