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Another possibility to earn their signature back would to be make x good reports - this would need to have an additional requirement of >x% accuracy to prevent spamming the report button. Say 5000 reports with >95%?
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That makes no sense setting up an x good report limit, this has been discussed before.
Imagine your life depends on x good report (escaping permaban). Would it be hard to register 10 or 100 or 500 fake accounts and post that x copypaste post with them, and your original account would report those and voilá, you just managed to get to the required x good reports, and you're free...
And the forum has managed to get another x unnecessary spam posts...