Problem with these apps is they require manual input. So if you pass a 'trap' you'd have to go on, register the location accurately. I don't think I'd be relying too much on people's info. It should have a 'trap verification' where if more than one user posts it, higher chance of it being legit.
Legit issue, especially since gloves + touch screen rarely work.
On another note, I posted a thread about ladar/radar deflector/jammers and stealth paint before lol
But on a serious note, as riders, I'm sure most of us will agree that speed alone does not kill. Hell, every time I get even close of being in an accident is during the good old car turning infront of me situation. I've also been knocked over while running/jogging across an intersection because the car didn't bother checking their right side. Then there's the incident where my gf's motorcycle got knocked over in a parking lot and the police never followed up despite the fact that she reminded them to follow up on it. Cops are here to, primarily, make money using laws that have fines, and secondarily enforcing laws that don't involve fines.