Had to look up "yuppie button" to figure out what they were on about. Sounds like a fun fellow. Lights up all of the lights on the back of the car for funsies. Oh they're all DOT-approved, so it's probably a good idea. Definitely a safety feature. Their manifesto makes them totally believe that everyone else on the road is the problem. https://techno-fandom.org/~hobbit/cars/yb/
[...] pulling this wouldn't let handsfree Bluetooth phone stuff work either, but I've never had much need for that [...]
Sounds like a fun fellow indeed.