Police aren't allowed to jam cell phones, so why should they be allowed to do this? Making the cops' jobs easier isn't something that always benefits society. (I'm totally for the cops in this case, but still they shouldn't be able to censor like this.)

I think this is a good point. I wonder if livestreams could be enabled but perhaps comments/feedback could be disabled or invisible to the poster. This could also address concerns that external viewers might feed a suspect/perpetrator intel on the police operation which might impinge their efficacy in an already difficult notice.