I can activate my stove if I put my 5 watt GMRS near it. Only on 467MHz though. And my neighbors motion activated light is activated by my 20 watt mobile, again on the 467MHz frequency. Not sure but my base station doesn't seem to turn on the light and it's the same radio I have in my truck. And I have headlamps that will turn on or change over to flashing if already on and my Fein vacuum sometimes gets activated.
I don't think it's from SE's, I think it's from the direct output of the radios.