Exactly.

How is a company telling someone what they can and can't do in their time off and not on the clock not infringing on their freedoms? Personal freedom is personal freedom. Drawing an arbitrary line in the sand vis a vis - government vs private companies, still violates the principle. People being mischaracterized and dragged on social media to the point where they are being fired from their jobs for having their own beliefs is getting to be a real problem(short of their beliefs being racist or otherwise truly foul - but now you open the debate about what is and isn't truly foul...).

While you could probably google libertarian and get six different answers to suit your argument - this would be the stupidest thing to ever argue about. "Oh my God, your using the WRONG definition of libertarian !!!"

If Moonman did this while on the company clock, then he got everything he deserved. Doing it in uniform, well that's just dumb.