While I can appreciate the speediness of flip-flops and slide on shoes, I don't recommend that to anyone. My father was in the Navy (aviation side) for 20+ years and one thing he always impressed upon us kids were certain things when we traveled (and yes we traveled alot seeing as how we were stationed overseas or away from mainland quite a bit).
One of the biggest things was to wear shoes that would not slip off so easily. (I guess something he learned while being in the Navy). Reason being, if you need to get off an airplane quickly you don't want your shoes causing you to fall back, etc. They always recommended laced up shoes so that if for example, there was a fire or crash landing and you had to run out quickly, you wouldn't be fumbling with your shoes etc. They stated that whatever you run in, typically is the best to wear while on an airplane (now I guess I can see if the kids are small enough and you have to pick them up it really doesn't matter what kind of shoes they are wearing).
Try running in slip on shoes or flip-flops vs. running in tennis shoes or any kind of flat laced up kind and there is no comparison.
Some "food for thought".
Exactly. There's a book called "The Worst Case Scenario" that says you should always wear lace up shoes when traveling in an airplane for exactly the reasons that you listed. I'd rather be slightly inconvenienced by having to remove my lace up shoes in the security line than find that I can't save myself or my loved ones in an emergency.