Are they dangerous? Take a look here: http://www.jetpilots.org/

On the red drop down link panel go to: members - safety centre - crash statistics.
Their link at the bottom of that page, with statistics, is not working at the moment.

A club I was in tried to have turbines banned because of noise (a noise report showed
what we knew already, that they were no noisier than 'normal' models in the air) and
the fire risks (the statistics showed that turbine models were less likely to cause a fire
than the detonating lipos used by the electric flyers in the club).

Interesting, all the problems were caused by the club secretary (a non turbine flyer).
After the members voted to continue turbine flying he went back to hiding under his rock.

The message: fly something better or different, you will be targeted regardless of the facts.

John.