@jiaklormee, it's true that I'm not a staff member and that I shouldn't dare to post in this thread unless I'm directly involved with anything in this thread which I'm not but still, I think I should post this:
1. Your post was actually very pointless and it also would have no meaning to users.
2. You either wanted to make a pointless post and now you're trying to get your infraction reversed with: "I just wanted to tell users that the OP was a scammer" excuse or you really tried to warn users about the OP (which I highly doubt as if you wanted to do so, you'd have posted something much more precise).
3. The OP had already been banned. Most of users with common sense would actually want to check the reason why the OP had been banned before proceeding with any sort of deal.
4. Overall, your post was unnecessary and pointless and in my opinion the infraction is pretty valid but this is just my opinion/point of view.