Yes it has; the specific amount isn't known. Back in the early 2000s when they changed the checked baggage search policy, it's estimated that it had a 6-8% aff

Yes it has; the specific amount isn't known. Back in the early 2000s when they changed the checked baggage search policy, it's estimated that it had a 6-8% affect on travel -- there are some nice papers from profs at Cornell who analyzed it. Somebody I know who's talked with airline CEOs confirms that they're concerned, but still hopeful that it will be transient. Airlines were ridiculously profitable in 2010; 2011 will be a tough year for them in any case because of fuel prices. When people ask me what they can do to help get rid of these policies, I tell them the best way to make an impact is to stop flying [or reduce as much as possible], tell your airline why, and suggest that all your friends, relatives, and colleagues do the same.