Following up a little on what John said, what people are asking for is not to weed out those that ask honest questions, it is to weed out the time wasters. People like:
The “Photo Collector”- You have three clear, well-lit photos on your listing and they ask you for three more photos… And then a photo outside… And then a photo on a blue background… And then a photo on a red background… And then a video… And then a photo of you holding the animal with a copy of today’s newspaper… (you probably think I am using hyperbole here but I have actually had someone do this to me.)
The “Let me ask my wife”- Spends a week asking questions only to tell you “Let me ask my wife and I will get back to you.” and then you never hear from him again… Until a month later when he messages you again asking all the same questions about a different snake you have listed
The “What is your lowest price?”- Asks this question for EVERY animal you have listed
The “Bottom of the barrel trader”- I see your animal is listed at $1200. I have 3 of the ugliest non-feeding Enchi males you have ever seen. Will you take them in trade? Not interested? How about I throw in a nearly dead Pastel to sweeten the pot. Still no? Okay, I am going to go and send you a new message about that $700 animal you have instead.
These are the people that sellers would like the option to weed out