I think Lemmy 0.19 instance blocking will make it easier but it’s still 18 instances. From the communities there appears to be about a dozen communities per instance. you’d need to go and visit each one and block them, or just wait for the latest spam from one of them to appear and block them, more than 100 times.

Good point, I thought there were less because it's always the same that come up. Wouldn't Lemmy 0.19 allow to block them all by blocking alien.top, as all bots are from that instance?

The point being, that even if they are useful, bot accounts and automated Reddit reposts flooding people’s “All” feeds reduces the quality of the Fediverse network, and leaving it up to users to go through an opt-out process that’s harder than opting out of individual cookie vendors is not conducive to a healthy online community.

That's valid, but on the other hand, if it were to actually work and bring people to Lemmy, then it would be positive for the community.

I find the Fediverser communities more useful than something like Lemmit for instance, because Lemmit doesn't add the comments, which are usually why people are on Reddit