I feel in the highly unlikely event of a plane crash, not much is going to help. I'm more concerned about the reality of turbulence and if I"m seatbelted in I want the baby strapped to me so he isn't jostled out of my arms and injured that way I agree with you one thing that works in one situation (evacuation) may be detrimental in another.
So sorry they made you take it off; they may not have been aware of the new rules?
And about them hassling you on the plane, that is why I say if you are going to wear it, wait until the airline attendants are seated and the plane is taxiing about to take off, but do not take this as safety advice either. I was watching that show MythBusters and I really tend to agree that a baby strapped to you is probably a horrible idea in case of a crash but a great idea if you want to evacuate. I have given this a lot of thought and there is no one thing that feels safe for all scenarios. Perhaps the FAA vest isn't that bad 'cause it has a long leash? baby would fly up but not totally get away from you? There are just so many accident scenarions. Nothing makes baby safer for absolutely all of them.