Then I would say a bit of extra restraint would be appropriate. Especially if the victim has a habit of trying to engage the perps and has set himself up as an extra visible target. Imagine Billy the Kid picking fights with every kid with a gun (yes, sure it would happen the other way around as well but Krebs is doing everything to fan the flames).

It's a fine line between crime and entrapment, so when your business depends on having these crimes happen to you then you should be extra careful in how you go about dealing with the perps identities, especially if they are minors.