Push Pins are Sharp People!

I am borrowing this picture from a teaching blog called Mrs. Lirette's Learning Detectives because I am writing this post on my net book since my laptop over heated and shut me down.  FYI:  I am planning to take off that borrowed image and replace it later.

I've been seeing this push pin activity for months on teaching blogs and Pinterest.  Can't remember what I was doing the other day, but I had an unsettling question come to mind.  Isn't putting sharp push pins in the hands of children a hazard?  I mean, are the teachers cleaning those pins with alcohol or something in the event that a kid pricks him/herself? 


Just something to think about!