I managed to create an underground street illegal drifting group in-game, we usually communicate through a private group in Facebrowser. Everybody drives legit jdm/oem types of car with a few modifications, everyone involved in the group actually did the whole work on the vehicles, I even engine swapped my vehicle completely. We usually meet up after midnight to do some doridore and touge runs on a few parts of the mountain, if anyone spins or crashes, we tow it back to the garage and work on it. If the car dies, we're usually mechanics so we pretty much try to fix it on the fly, if the player doesn't want a quick fix, we take it back to the garage. We have an illegal street racing group on the server, you guys probably never heard of it 'cause we try to keep it really on the down low because of the cops.
Only thing I would really love to see is a korean mafia with north-korean or chinese weapons connection that utilizes the LS Docks to contraband the crates in. Little Seoul is literally a small town that can be controlled if done right. Yakuza small family affiliated with another family that is afilliated with a Kai, something that starts from the ground up.
Also, that korean branch off the Inagawa-Kai would be an awesome role play aswell.