Reader, Writer, Merciless Reviewer and Incurable Romantic
Bots and Spammers are routinely purged.
I've been watching the discussion posts about spammers, and I've been keeping an eye on my followers. On Monday, I purged 65 spam/bot followers. Today (Wednesday) I purged four more.
I'm not purging old followers who haven't been active; I don't know if they're still reading my posts or have written off BookLikes completely. They were active once and might be again.
But these new accounts that have 26 automatic followers and follow no one else, who never shelve books, who don't read or post anything -- they're going to get purged at least once a week, maybe more often.