[sliverstorm]

Ok, maybe no air raid sirens. But you could talk over them, which is a bit more analogous to what was done here :)

[Retric]

Talking over each other would be the same as running two or ten routers on the same channel, which is not an issue. This approach actively prevents communication.

[sliverstorm]

So... more like pressing the "hang-up" button while they talk on their phone, or pulling the plug on their loudspeaker?