While I understand your point and concerns

What if the person does not wish to participate but wish to re-home an animal ASAP because they can no longer keep him?

Also with your 500 posts limit this would mean reputable breeders/people (Albey (129 posts) , Ben Renick ( 439 posts), EBN (47 posts) , BHB (137 posts) ) from whom I would buy without hesitation would no longer be able to post an ad in our ad section since obviously they do not meet YOUR requirements and since when you make rules everyone has to abide by them no exception

If someone wants to scams others they will whether they have 5 posts on a forum or several hundreds, know who you are buying from, ask for references, ask people you trust in this industry about the person you are planning to buy from. RESEARCH reserach research!