I've used my credit card for any online purchase. When I ordered high pressure sodium light fixtures, they went in a greenhouse, so that vegetables can be grown year round..So I would like to see them bust me because I purchased something...

If you could get into trouble for buying certain items, they wouldn't be able to sell them. It's not illegal to buy them, it'll illegal to use them for specific purposes, that of which they will have no idea what you're doing unless you're not smart about it..