Everyone is out to get us!!!
Now you ask about seeing receipts. Do you have all the receipts for your booze? I certainly don't. In fact I have a few cartons of wine worth a pretty penny now, which if I chose to sell them wouldn't come with a receipt of when I bought them last millenium.
People are members of many forums and as such just lurk and post stuff for sale incase they get a bite.
Look how many users on here have a 0 post count, doesn't mean they are all here to pedal stolen goods.