I was out last week and listening in to any air traffic that I could pickup and started to hear some crosstalk on the Approach frequency(s). I figured it to be somebody's cordless phone, and they were talking about their kids and- nothing exciting. Okay, so maybe it happens.
Then on Friday, I was listening in and Tower cleared an aircraft to land. Okay, no biggie. A few seconds later I hear them talking about "how they should avoid [highway] 401 and 427..." and I thought - that's interesting! I've never heard of them talk about these landmarks before. I checked the frequency and it was on 118.7 (CYYZ TOWER). I thought maybe an aircraft or tower were communicating for some visual approach/landing. The conversation developed and it was clear this was NOT the pilot/ATC communicating.
So, here's the question... who or what else uses AIR frequencies?