You are referring to OP, I understand. I would like you to clarify this. Are you saying we have another pokapoka124 case? In the archived link I can't see any evidence of plagiarism, and if so it should have been reported.
Also, if it was just one time, it would maybe happen as in the case of Mpamaegbu. I think someone who only plagiarized once, maybe twice at most in the forum (depending on the case), especially if his contribution to the forum is positive, should be dealt from a lenient perspective.