members creditability

I can speak from direct dealings with this POS. I have held parts till he got his disability check in only for him to have a Family emergency and back out, twice or promise you to pay you when his hunch back brother straightens up. I lost a sale held a part for him from another member only to have him back out. So I put him on my ignore list. Now the only time I have to hear about him is in a case like this. But I feel I should make other members at least be on their guard when dealing with him.