Censorship isn't just done by stopping someone broadcasting a view, it is also done by punishing those you express that view as a deterrant to any others out there who would want to promote or broadcast that view.
Censorship can be done by governments, institutions, individuals or society as a whole.
I'm not really conflating the LGBT history with RMS views, merely noting that attempting to surpress non-majority views can be bad by using them as an example.
