I do not like Trump. As an anarchist, I do not like the government at all, reject its claimed authority, and oppose every overreach it makes.

Freedom of association is a natural right. The First Amendment partially acknowledges and claims to protect this right. The right to choose with whom one associates necessarily also includes the right to decline to associate with others as well. It violates no right to decline to associate. There cannot rationally be a right to impose one's self upon others. However, that is exactly what Trump and every other government official in the executive, legislative, and judicial branches do themselves as a necessary part of governing.

So while I agree that Trump has every right to use the "block" feature as an extension of his right to freedom of association, I can't find any sympathy for him when he is faced with a tiny aspect of the very political injustice he embodies as a politician. My only complaint is the precedent it sets for everyone else.