We've had several clients ask us to disable their blog comments in the last 3 or so years and the reason was always moderation. Even when the comments generate

We've had several clients ask us to disable their blog comments in the last 3 or so years and the reason was always moderation. Even when the comments generate good conversation or produce something of value SEO or community wise, it's not worth the effort to weed out the bad comments and conversation you don't want happening on the blog. For our clients, it was almost always turning into a political discussion. Even on posts talking about something as innocuous as an event that was held for the company's employees, people would turn up and start talking about something political and it would eventually devolve into threats and dox attempts. It just wasn't worth the moderation effort anymore. Spam can be blocked automatically by tools fairly easy but actual conversations unrelated to the topic at hand required too much work. And in one case, threats led to police involvement and that was more than the client was willing to deal with.