I don't think i'm on the mission and i certainly won't be persistent furthermore.
just tried to talk about practical things. Admins will take care for this anyway.
I don't think you understand the situation on the forum well. You should avoid posting in such threads and focus on reading. The fight against signature campaign spammers is going on for a few years.
My suggestion was to have a captcha for posting to lessen the bots and without removing the post duration restriction.
This effectively does nothing. It is quite rare for a bot to go unnoticed for a longer period of time.
The problem is deciding whether to reward for posting, or post for rewards.
You should be rewarded for posting. Once you start posting for the rewards the likelihood of a ban increases significantly.