Until you offer a way for blacklisted accounts to exit your blacklist I won't vote on this proposal.

What you do is right and essential for this platform but in my opinion you get carried away and add everyone to the same bucket. I understand that fighting abuse you start seeing rotten in everyone but you should put more effort in explaining what behavior is not accepted and warn before condemning. If you're too busy (and I'm sure you are) you should delegate someone else as I'm sure other people are willing to do so.

For example, almost 2 years ago one of my bots was auto-replying to an abuser. Because of a bug it replied also in a thread in which you were involved and you decided to blacklist my bot forever. It was not spamming as it was only auto-commenting on my own posts or target accounts that agreed to it. I asked multiple times how to solve the problem and get out of the blacklist, you never bothered replying. You simply sit there and mock/laugh at people asking for resolution.