Pseu

It probably wouldn't hold up in court, but it can be used as a bludgeon to dissuade people from filing in the first place. Roku is totally allowed to lie and say "You can't sue, you agreed to mandatory arbitration. // You can't join the class action, you agreed not to. If you do either of these things, we'll sue you."

This could easily dissuade quite a few people from litigating, limiting how much the company needs to pay out.

It is. And it was done without a permit, so the city might fine him over it too. https://apnews.com/article/twitter-san-francisco-building-x-elon-musk-4e0ae2a3b1b838b744bb2dc494f5b23c