Creating it and selling it is an obvious attempt to profit from the custom of those who wish to use it to actively harm others. There's literally no other reason for anybody to buy an "anonymous" one over a standard one which says what it does on the stick, and yet they're charging $5 more for the anonymous one...

It's a curiosity item. I would buy an anonymous one if they were $30 or less. It's interesting to have around, a conversation piece. The anonymous one increases the interest, because it better demonstrates the danger, the precariousness.