On: Quiet for Android – TCP over sound

[saganus]

In Mexico at least.

Now that I think about it, I do have seen red ones in Canada and the US.

In any case, it seems that it's a color chosen to comply with some law, instead of just an arbitrary choice. In that sense I'm not sure if regulations would let movie theaters (or other businesses) change the color.

[breatheoften → saganus]

I agree that there is probably a regulatory obstacle — i imagine its at least theoretically possible to overcome and would be pretty cool!