That’s an old story that involved way more then selling panties.
As far as the legalities of what we do? I’m sure there’s a trivial law somewhere but I wouldn’t loose any sleep over it. Mailing Bio Waste could be illegal but then again is sending home your laundry for Mom to wash a crime?
I say relax and don’t obsess over the legalities. People have been doing this for years with no problems. 😉