The ones I have were only £2 each. And when I got them, when DS was asleep I ran them all over my hands and arms. It's useful to know that if an accident should occur, it won't IYKWIM. However, I would never let Liebs see that being done! That would be irresponsible. He still has to treat them as knives, therefore with respect.
it's more that it's done at kids markets and things - it's a great selling point, but anyone could see it - and that anyone could be an impressionable kid. i will remain torn on this one for a little while i think