I thought it would be pretty cool and funny to set this as a power on/off button for a computer but I don't know if normal people are allowed to buy it.
Yep! That's my direction of travel so that's where I want to be looking. I'm still going to look side to side to make sure the traffic has stopped. What ends up happening, especially when it's busy, is that the person who pressed the button stays standing next to it so you can't see when it's clear.