There are tools to remove them in your follow list. Not sure about the mute lists. Some clients like amethyst now have an encrypted mute list, which complicate things
Discussion
Any links for the aforementioned?
nostr:npub1cc79kn3phxc7c6mn45zynf4gtz0khkz59j4anew7dtj8fv50aqrqlth2hf
DM this bot hi. It will lust you what it’s capable of. One of the options is the inactive follows
It unfortunately did not respond
Might be the type of DM you're sending (there are now different encryptions). There's a webpage for it, too.