MrQwerty posted:

Some of them make you blow-suck-blow, some of them make you hum while you blow, most of them make you randomly retest while you're driving in traffic. If you have enough DWIs or get caught having someone else blow here they can mandate you a super-expensive one that has a selfie camera installed in your car. All of this is a constant drain on your battery, too, and disconnecting the battery from them can immobilize the car.

I knew a chick that had a regular one and she forgot the perfume rule and had to call in to work in order to go pay $80 at a lab to take an ETG so her PO didn't throw her in jail for a week. Again, the sentiment behind having them as standard equipment is understandable and good, but they're not actually a device you want to interact with on a daily basis under any circumstances, which is part of the point.