I don't think it's petty in most of the cases. I think unfollowing a friend and letting them still follow you is more disrespectful. Also, that is not the only

I don't think it's petty in most of the cases. I think unfollowing a friend and letting them still follow you is more disrespectful. Also, that is not the only use case. I like to keep my following neat, so I use it for occasionally unfollowing some company or celeb accs that I am not that interested in anymore. So it works also as an organizer tool, since you can query over those accounts in the extension as well.