This would seem to remove any abusive/illegal incentive for posting. Requiring that the posts be created prior to the thread, means that there would have been no possibility that the user is posting with this thread in mind. Maybe I am being naive, but this seems to be the important distinction; a very thoughtful rule.
Yes, I made the rule exactly for that reason. To avoid users to post/spam and then ask for merits. I dont know if that is the difference between this thread and the others that were not allowed and were moved to Off-Topic but it just might be.