It seems like any community where you follow people instead of topics is vulnerable to being taken over by Irresistible Conversations. This happens on Twitter, Facebook, and even Mastodon. (Though only twice here so far, that I've noticed.)
This is because even if you don't care about <topic in the news> and didn't read about it directly, some of your friends will inevitably comment on it.
By contrast, Reddit and Usenet (in the old days) have some natural immunity to Irresistible Conversations due being topic-based and having rules against cross-posting. So your friends will likely write their comments about the I.C. in a forum you're not subscribed to.
cmpwn.com is a private Mastodon instance for friends of SirCmpwn.