So technically if you have a garage sale, you need to pay income tax on all items sold there too? Even kids selling their toys to the neighbour's kids?
As a Swede, who is used to very high taxes, this makes little if no sense to me. As you say, it's totally impossible to control. Laws that are completely ungovernable should be either altered or removed, in order to improve the efficiency of the government. My two cents.
Makes me curious though, if I sell +20K on ebay.com will Paypal report me to the IRS even though I'm not an American?
Laugh at you in ecstasy, wallow in the gore.
Blast you with their twisted minds, behold the Dogs Of War.