[vo!?]

ALL kandi kids are irresponsible drug users
Irresponsible drug users harm the scene
Thus, ALL kandi kids are harming the scene

This is the OP's argument.

"All kandi kids are irresponsible drug users", while some probably are there's no basis to support this generalization of the kandi kid demographic.

"Irresponsible drug users are killing the scene", if we agree that the "scene" is any rave/party, then this premise holds true. Drugged up kids who don't know what they're doing WILL cause harm to any party, in the form of increase scrutiny by authorities, OD’s, dealings gone bad, drama, etc.

The argument should have been:

Some kandi kids are irresponsible drug users
Irresponsible drug users are ruining the scene
Therefore, Some kandi kids are ruining the scene.

lol which most of us already agree with. im so bored at work arghhhhh.

-v