Only if the defendant can prove that he was not predisposed to commit the crime, and that he would have been unwilling to do it but for the intervention of the government.
and any conviction resulting from these nazi-like tactics should be struck down.
"Nazi-like?" Are you serious?
Not really. I'm just sick and tired of this stupid crap that equates cigarettes with cocaine, where we need "stings" to stop underage smoking. I don't really think the cops are acting like nazis; they're just doing their job and enforcing the law at the behest of idiot politicians. But the anti-tobbacco movement as a whole is nazi-like. Their Goebbles-esque propaganda campaign could have been written by Leni Riefenstahl or Sergei Eisenstein.