Here's another good potential feature: purging of unwanted followers, either manually or even better configurable based on parameters or filters.

cc nostr:npub1r0rs5q2gk0e3dk3nlc7gnu378ec6cnlenqp8a3cjhyzu6f8k5sgs4sq9ac since you're talking about a mystery follower spammer nostr:note13ctjnj9ulxy4ld9agw25tdw2njpzq6kdnt47dztx8gd7x908w89srlx622