Let's face it guys--in most parts of the Northeast, if you're traveling on an Interstate, you have to be going a good 10+ over the limit to even get pulled over. In NY, the State Police won't pull you over unless you're doing 15 over. One female Trooper told my wife "Just keep it under 70 sweetie and you'll be fine". In 55 mph zones, their motto is "69 is fine"
Let's say you're sitting in your computer room and you respond to an e-mail from some strange female. You start a correspondance with this "girl" who tells you she's 14, when in reality it's a male FBI agent or detective doing a pedophile sting. The correspondance gets more and more heated over the next few weeks, and you make arrangements to meet with her. When you keep the date, there's an army of cops there to slap the cuffs on you. If that's not entrapment--and take my word for it that it's not since you're going to have a hell of a hard time arguing no "predisposition"--what makes you think that hiding a cruiser behind a bridge abutment is entrapment?
There's a big difference between dirty pool and entrapment, from a legal standpoint

And in my mind, anything that flushes out a guy who'd want to screw a 14 year old he met on the internet isn't even dirty pool.