Reading this post answers my question. Should I bring my scanner with me next time I board an aircraft? LIke someone previous stated, if you're doing something illegal, then it's nasty.
I once brought my portable scanner through the security gates at the Ottawa Ontario Parliament Hill for Canada Day fireworks and nobody said anything. In fact, it wasn't worth it, because I got too many cellular phone freq's skipping through the aircraft freq's.
I agree. bringing a scanner to an airport or even onboard an aircraft is NOT
illegal. the only thing illegal about it is operating it when the plane is in motion. Once the doors are closed on the aircraft, you may not use it. It is on the list of electronic devices to not be used on the plane while it is in motion. If at the gate and the doors are open, just like your cell phone, you may use it.