This is effectively how I got permabanned as well. Not with an alt, but I made a new account for reasons unrelated to bans, deleted my old account first, and when I commented on something on the front page, they banned me from the whole site for ban evasion.

2 years later (about a week ago), a search brought me to a post where someone has a file I would like. They seemed excited to share it with whoever wants it, but will only share it via DM for some reason instead of just positing it. I made an account and heard you can’t DM people right away, so I made some comments to get past the spam restrictions all over the place. I somehow got banned from the personal finance sub, I have no idea why, and it says they blocked me from even asking. 2 or 3 other subs deleted my comments automatically based on the account age. I assume if I accidentally try and comment again I’ll be banned. It has been a horrible user experience.

Being banned was the best thing that ever happened to me. Enjoy the freedom.