No, not at all. I think in my case what I post is who I am. Fortunately it just matches my own goals as well.

Suppose an event happened.... Who is to say that such an event hasn't already happened ;-)  Could you tell I was protesting or not in any of my uploads? For me, the stuff I do, it may often take more than one perspective to see a meaning. I really take the saying "a painting is worth a thousand words". What is one person's protest might not be another. Anyway, I am a student of classical Chinese painting, so what protests I do will often be in the manner of how the old Chinese artists and scholars did their protests, which sometimes could be rather subtile.

By self censoring.... No need to consider it self censorship. What you see in my gallery is what you get with me. Nothing hidden. It's a good reflection of what I like, who I am, what I appreciate. Anyway, everyone does self-censoring all the time, it's part of human nature to be cautious of what we say, who we say it to, what we wear, what we don't wear, what we eat, what we don't eat. So, in my opinion, nothing wrong in self--internal--censorship. What can be wrong is censorship from others.. external censorship. There is always exceptions, though, which is one reason for rules and law. Those things are a living practice of all forms of censorship--good and bad ones--in action.

Enjoyable questions. Good thinking stuff. Thanks for asking. :-)