I went to the Local RC field last Sat and I was Shocked and scared to death after reading all these messages.
One guy had a 1/5th scale Arf and was running it up with people standing in front of it. Another guy was running his pattern plane up with his Kids 5 feet in front of it.

The bad part about it was.
Out of about 40 People that was there you saw maybe 5 getting out of the way.
The rest was standing there just watching or not paying attention.

I am not a Politically correct or Hollier than thou type person. But all I could see was one of these motors coming off and eating 3 or 4 people up.