but I think there's nothing wrong of giving second chances
There is in this case.
Unofficial list of (official) Bitcointalk.org rules, guidelines, FAQ25. Ban evasion (using or creating accounts while one of your accounts is banned) is not allowed.
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If you get banned (temporary or permanently) and create a new account to continue posting / sending PMs, it's considered ban evasion. The only exception is creating a thread in Meta about your ban.
There's not much that can be done to stop it but encouraging someone to break the rules probably isn't a good idea.