Yes with kids it's hard to control anything ! They will turn their transmitters off and on without turning off the copter and yep that will be a problem with the Dromida if the timing is right.
I'll have to test the RISE system tomorrow with multiple copters.
Spektrum will be less likely to cause issues. The issues I experienced with Spektrum was, again with kids powering their planes on first and someone else was trying to bind or rebind their TX to their new plane. Wasn't a big issue but it can and did happen.