Alcohol monitoring bracelets

AP reports:

A judge has ordered Lindsay Lohan to wear an alcohol-monitoring bracelet and refused to ease restrictions involving drug and alcohol testing so the actress can film a movie in Texas. …

She spent more than two hours after the hearing waiting for a bracelet to be placed on her ankle. The device gets a signal through the skin if a person has been drinking and sends the signal to the company that monitors it, court spokesman Alan Parachini said.

I didn’t know this technology exists. I wonder how long before Sir Geoffrey Palmer proposes that such bracelets be made compulsory for anyone aged under 25?