[16thregioner]

How about this. There's this guy who sells heroin. There's also a lady in his town who hates seeing all the drug use in their town and knows he's the one selling the heroin. Lady calls the guy and arranges to buy some heroin, and records the call. She takes the recording to the cops. Cops do their investigation and arrest the guy for dealing heroin.

Who's really the bad guy in the scenario? The heroin dealer who was set up with the phone call? Or the lady who decided to be the vigilante i order to try and get the drugs out of her town?

Only difference is the gang the lady is working for deals heroin as well.  In this case, she only wanted the guy to be caught to clear the streets of him for her gang's own heroin deals.  If the lady was truly a neutral party, then kudos to her.  In this case, though, she wasn't.