The key part of this is the word arbitrary. You can't take 'anything down for no reason' The government can prevent you from branding your email product 'Gmail

The key part of this is the word arbitrary. You can't take 'anything down for no reason' The government can prevent you from branding your email product 'Gmail', they can censure you for shouting fire in a crowded theater, they can go after you if you issue a tweet which lies about how many cars your car company is going to build in the next quarter, etc. All of those things have due process and objective standards attached to them. None of those are arbitrary. Those are all following established law. That's a far cry from only saying, "Okay, these messages are 'bad.' We're now de-platforming them."