Personally I don't mind if the useful post was written by clown, just like how we give merit because of the good post, not the user.
If the content is relevant and useful, I don't think it matters who wrote it. Since for those who understand the trust system of the forum, you will not look at the OP of this topic, but at the content of it. Perhaps those who visit the topics the most are newbies and many may still not clearly understand how the trust system works, nor will they notice it.
Don't you find ironic
at all that a topic which is representative for
Legal board (such as
List of court cases, complaints, regulatory actions, etc.) to be written by a
scammer, also involved in account selling and account farming?! Seriously?
Don't you find ironic
at all that a topic which is representative for
Scam accusation board to be written by
a felon arrested for scams?
No doubt I find it very ironic!
But who better to explain how not to fall for scams than the scammer himself? They know well how the scheme works, so they are the best at explaining how not to fall into this trap.

Of course, that doesn't make much sense and doesn't look good. But, as I commented, the majority of users who will look at these topics are users who don't know well how the forum's trust system works and therefore don't even notice it.
But I agree that this and other topics can be written, with more current information and by more reliable users (to date).
GazetaBitcoin why don't you try to make a new topic on the subject, and then ask to be pinned in place of the old one? It doesn't hurt to try...