I didn't know what you were referring to, so I looked it up. Sounds like a great idea--except that it is under the control of children. I think my son would have had a lot of fun terrorizing the dog and cat with it. On the other hand, it seems like an excellent idea for just about anyone. Certainly college girls could use one of these when walking around campus, especially after dark. Small children could use these as an added precaution when they have to walk to school. More and more school districts are dropping school buses and kids have further to walk to school. This might be an added bit of security for them.