

I think the utility of blocking people on a public platform is kind of fake anyway. If someone is harassing you, and you block them, it’s obvious that you did it so they’ll just log out and suddenly they can see your posts again. Accounts are trivial to make on the fediverse too so they can always just spin up a new one to harass you.
I think silent filtering is better for that reason because they can’t tell that you did it so they won’t just immediately switch to a new account and keep going.
Active blocking like you’re talking about only makes sense if there’s such a thing as “follower-only” posts imo. Otherwise it’s a false sense of security because they can see everything anyway just by logging out or switching to another account.
All of your temporary privacy addresses will be coming out of the same subnet, so it’s clear they all belong to the same people.
Ultimately the privacy extensions are just bringing IPv6’s privacy back in line with IPv4, because without the privacy extensions every single device has a separate IPv6 address based on its MAC address whereas in IPv4 most consumer networks have every device sharing a single IP.