About your parenthetical: not sure the recent cases about government officials blocking people on twitter applies here, at least straight-forwardly. E.g. it's n

About your parenthetical: not sure the recent cases about government officials blocking people on twitter applies here, at least straight-forwardly. E.g. it's not illegal for whitehouse.gov to put up press releases without a comment box. It seems like the twitter cases had more to do with choosing to deny comment from certain people, when comment was open to others.