Really? There's a huge difference between a flashing cyclist light (front or back) and the lights found on an ambulance or police car. Let alone the lack of siren. Even if somebody has a handful of flashing lights, they're not going to be confused with an emergency vehicle.

I'm sceptical that anybody thought a cyclist was an emergency vehicle. At best we get confused with a motorcycle if our light is bright enough, which generally isn't a bad thing. Typically, a flashing light simply means "cyclist!" to most motorists around here, which again, isn't a bad thing at all.