I will come in deadstick now and then if i'm the only one at the field b/c it's fun. But usually cutting the motor from the xmitter rather than by chance. With a crowd in the air or at the field in general. it's not a good thing to do as is stated everyone has to get out your way, etc. needing to walk out on the runway to retrieve the plane, etc, etc. Having flown sailplanes for many years it's really not that big a deal if you know how your particular plane reacts. our club will pull the throttle back all the way and make you land as part of the flight test. Engines have been known to quit whether the timer goes off or not. Eveyrone should know how the plane reacts with no power otherwise its sort of like driving w/out knowlegdge on how to change a tire. When it happens.. and it will.. you will be more panicked than needed.