Funny.
Say a seller standing outside a concert and keeps on yelling and showing picture of a entry ticket that appears genuine. Each time a buyer attempts to transact but requires seeing the real ticket, the seller will make tonnes of excuses not to transaction and disappear.
So the seller is not a potential scammer? I would definitely claim the seller is a lot closer to a scammer than to a crazy person.

What about seller whispering to offer drugs, but when want to transaction, he disappears. Is he now not a drug seller just cos he didn’t show up with drugs?

I guess the world’s perception has changed