RV7guy makes the point that no heli can outrun its own sound, while thats true, low flying and coming from behind cover its dam hard to pinpoint at all till its over the top of you. RV7guy also states that we should have a safety person standing by you, but from what I have seen with observers/callers at competition events I dont put any faith in that, too often I have seen these observers gasbagging in thier cell phones or gabbin with thier pals while all hell is breaking lose and they are the last to know. There is even a thread on here that shows that quite clearly. I will post a link when I find it. To me the bottom line is why do we law abiding rc'ers have to put up with clowns dont disregard flight rules? why isnt there some sort of authority to look into these clowns? will it take an incident with loss of life? and then what? the full size fools get away free and we get hammered with more rules and regs? I have a nice selection of photos of low flying aircraft flying way low over registered airfields, some low enough to count every rivet. Yet from what I have been able to find out, min hieght for full size is 500' agl and some areas its anywhere up to 2000'. How about haveing these enforced?