No, I don't agree. I believe this is just the first step on the road to more secure flight decks. This isn't about inconveniencing passengers, this is about making a successful hi-jack less likely, if not impossible. One of the elements of the 9/11 events was the hijackers successful ploys to get the pilots out of their flight decks. While locked doors won't stop that (and all US carriers operated locked-door policies long before this), it shows passengers a clear intent on the part of the carriers to improve security, and thus hopefully increases confidence.
The incident on the BA 744 was not an attempted hi-jack, but it did highlight some problems with our then-current flightdeck access procedures. Things on UK carriers did relax again thereafter, but then it wasn't the government that imposed the temporarily increased security, was it?
Another thing, this is only one visible security measure on the aeroplane. There are others, some not so visible, and there are many more to be applied on the ground. Passengers will be inconvenienced, slightly, but will accept it.
Don't expect any flight deck visits in the future.
[ 30 September 2001: Message edited by: Scroggs ]