Am I the only one who tries to play as "legit" as possible?

Well, others in this thread have defined it as "anything against the ToS". Including chair-jumping, cursing, and asking people for their real name.

One could also argue that "chair jumping" gives you a benefit of admiration or something.
What benefit does hacking for an unreleased hairstyle give the player? Yet people were banned for it.

I would call that "law-abiding", myself, not "legitimate".

Hairstyles are an in-game benefit. CF: hair coupons, quests that change hair, etc. The involvement of legal tender in the hairstyle system is enough to make me leery of any exploits dealing with it, let alone active hacks -- though on a personal level, Nexon's failure to keep the Cash Shop almost or entirely aesthetic-only rather dulls any discomfort I might have with hypothetical hairstyle glitches that are universally exploitable.