Fediverse

Even with the Hashtag misuse that's not as bad as group spam, since people spamming groups can reach further than they otherwise would just spamming on their server. Which is why being able to moderate groups is important. Also with Guppe's system you can create any group you want without authorization, that's a problem because malicious people can create groups that aren't acceptable including ones with racist and illegal content and use it to distribute that across the network. I found a few of these without much digging and I quickly reported them to Mastodon.social and got them suspended but they're still there on the other servers.