There may be no meaningful legal sanction for this.
Don't you think it would be better to go through a system which has (at least a semblance of) due process, fairness, and transparency about the rules? Yes yes I know I know, "they're a private company they can do what they want". I'm not wondering what they can do, more flabbergasted about the apparent sudden and large support for corporations acting to censor and punish people like this.