I agree about cell phone use in the cockpit. I call my wife regulary on my Trac phone when I cross the house heading for the airport. She knows II will be home in an hour. The 3G on my IPad Doris interfere.
I use Foreflight for my charts and approach plates. Recently I forgot to turn the 3G off before takeoff. I got an annoying Beep,Beep, Beep in my audio of my headset. It drove me crazy . I turned the volume of every radio I had down and it didn't go away. Finally I thought about the 3G. I am glad I wasn't in busy airspace.
A few years ago I was landing, directly in the sun, when 2 deer stepped out on the runway. Thank God for an observant Air Carrier. He spotted me down the runway in front of the deer. The amazing part was after I tied down these same deer walked directly behind the tail of my plane while I was tying down the wings.