Jumbo,
there is no restriction on bringing the scanner through security. I live in Toronto and regulary take my scanner on board. They sometimes see the antenna on the xray and want to see what it is, but once they see it they are OK with it. I had i swabed once or twice. That is the good news. The bad news is that the scanner is totally uselless inside the airport and inside the aircraft. I have the Icom IC2 unit and it works great with a bigger antenna on my balcony, but even with the antenna on the balcony, it does not work well when the unit is indoors. I turned it on inside Pearson terminal 2 and it works, marginally if you take it near the window. Once inside the aircraft there is no sign of life. I am ocourse talking about air frequencies only. I haven't tried cell or police frequencies. Let us know how it works out. What unit are you using?