I have really only seen the bubble wands at Fantasmic and a few other large shows with the occasional one while walking in the park and maybe a couple times while waiting in a queue. I have never seen them in a restaurant or on a ride. We normally try to go to WDW twice a year, so we are often.
That said, I also have never seen a gold treasure while diving, that doesn't mean it doesn't exist.
Now, I will admit, when I see bubbles I see a challenge. I reach for my camera like a gun slinger reaches for his gun during a duel. I try to get them in focused and concentrate on a single bubble. Problem is, I am like a dog and chase each and every bubble, only with my camera instead of my mouth.
I personally don't mind waiting in bag check, the longest we waited is maybe five minutes. It may be a flawed sense of security, it is still some security and in the right direction. I am guilty of a large complicated bag, I carry a large camera bag that usually weighs 30 to 40 pounds. Yes I know already. But I always have all the zippers open, any balky items removed and make it as easy for security as I can. It usually takes ten or fifteen seconds to go through it all. The one thing I wish Disney would do, would be to make everyone go through the metal detectors. I may be have to go through 20% of the time. And yes I have recorded many of these numbers. I am an engineer and no, sadly not the fun kind that drives the train. It drives my wife crazy, everything is numbers to me.