The important thing is that: You realize that it is your fault. You want to improve. You put in effort into 2. There are likely going to be people attacking me from heavy sides due to this, and those are the people that have really deserved to be banned forever. This is why I'll run a separation of the blacklist into people that are banned forever and those that may get un-banned if significant improvement is shown.
Yup, it's difficult to blame someone else as I am responsible for my own post quality. That's why I will put more effort and thought in my posts. People that get mad for being kicked out should look at their post history. If they then still don't realize why they are kicked out, then they never will.