I think as long as you are buy moderate amounts, and it get confiscated, you will get a letter saying so. In which case, you do not respond to the letter x_x. You lost, deal with it. I think there is only real risk when you are ordering large amounts with the intent to manufacture (cuz that's what large amounts signify). My brother bought aluminum powder off the internet and atf knocked on his door. he was gonna make m80's and 1/4 sticks for 4th of july, but they though he was a terrorist...ahahahah. They had a print out of every website he was ever on and it was as thick as a phonebook....All in all, they just threatened him with possible jail time and confiscated all his materials. there is a moral in here somewhere or another, you'll just have to find it.. lol