There's a reason why a lot of forums went downhill and got replaced by Reddit... moderating them is a constant effort (and Reddit at least takes over the legally mandated stuff like CSAM, piracy and basic anti-spam), admins are tired of skiddies exploiting phpBB or whatever vulnerabilities the very second they get public, you gotta deal with trolls DDoS'ing you for fun, and also users are lazy because they don't want Yet Another Login (not to mention, Reddit centralizes notifications vs a flooded mailbox). And for blogs, the situation is very similar.
Forums died all the time back then because the admin got tired of the mess. People these days would be far less tolerant of joining these small groups and pouring time into them, only to have them disappear a few months later.
So what now, a ban on "mass communication for everyone at scale"? How exactly will that be defined and enforced?