What's more humiliating than having your team's vinyl sticker being cut in half and taped upside down by the person who beat you? It's downright insulting. And Team Emperor did just that as they were trying to conquer the Gunma prefecture. Some one made a joke about that. What if the race between Kyoichi Sudo's Evo 3 and Takumi Fujiwara's AE86 was actually an official battle and Sudo won? Takumi would have to ask his dad for a Tofu shop sticker for them to cut in half. Then people would think Sudo's Evo 3 is some sort of weird tofu delivery vehicle... (laugh)
Speaking of team stickers, have you notice that after Emperor, we don't see as many team stickers any more? We know that none of the teams in Fifth Stage has sticker. (Team 246, Team Katagiri, Team Spiral and Team Sidewinder) The same goes for Fourth Stage with the exception of Team SSR (Seven Star Leaf)
A team logo/sticker is like an identifier to street racing. Perhaps the reason why the other teams didn't have it is because they don't want any troubles from the police as prefectures like Kanagawa is more urban than Gunma, police presence would be significantly higher. That's one way to look at it I suppose.
So the question is, assuming you belong to a street racing team, would you race someone if losing the race mean you have to give the opponent your team sticker?
(Image credit: Initial D Second Stage ACT.1 掟やぶりのスーパーウエポン! "A New Threat!")