[Someone]

I think he refers to having a system that, using this approach, turns on his shower when he enters it. If this cannot distinguish humans from cats, it would turn on the shower when a cat entered it.

I think that's a bad example. The typical cat would soon learn not to enter the shower.

[archon]

> I think that's a bad example. The typical cat would soon learn not to enter the shower.

My black lab, however, would enter the shower every time I forgot to close the door.

[nooneelse]

If the system has enough lag, clever cats might dart in and out before the shower sprayed for a brief bit, so as to get some fresh water (which they like more).

[ajvargo]

I'd be more concerned about when your kids figure out the gestures control things.