I'm all for cracking down on excessively loud and stinky cars, but the GR Corolla is not that loud, and it has modern emissions controls. It is also, believe it or not, possible to own a moderately loud car (even with a modded exhaust) without subjecting your neighbors to backfires, 40 minute idling sessions, and loud fly-bys at every hour of the day and night.
The attitudes in this thread really show that people just don't get it, which is probably why the driver's car is an endangered species in $CURRENT_YEAR. How many cars are available in the US with a manual transmission these days? How many that don't cost six figures (or more)? You don't have to be excited about the same things as this guy, but there is a whole lot of projection going on in here from people who can't seem to think beyond how you're perceived by others as the main factor in choosing a car. Have you considered that maybe this guy just likes the car?