It seems like a small difference, but lack of discouragement isn't the same thing as encouragement.

Stings of this type (and undercover drug busts, etc.) are routinely vetted by the DA before they start, specifically to maximize chances of a 'good collar', as they say on the cops shows. "Entrapment" is guaranteed to be the first line of defense in a trial, so the police are very careful.

If we were going to have any sympathy for now-ex-Senator Craig (and we ought to), it shouldn't be over how he was caught. It should be that he was incapable of honesty with himself about himself, and that he felt driven to the extreme of hook-ups in men's rooms. Better by far to 'come out' and be real than to live a daily-compounded lie.