Once at a Berlin airport I had my camera and film in my bag, they all went through the machine. The operator asked to look into my bag as it came out and asked if my film cannisters were batteries. I said no they are photo film, she opened the canisters turned the films around in her hand, placed them onto a tray and ran them back through the machine! This was 2010.
This proves there are no standards airport checkpoints are educated on, and no standards the industry managed to get airport security to stick with.
Lead bags are all the same, not a chance they guarantee anything (except arrest perhaps, since you're trying to hide something, not exactly what you want to do these days at an airport).
Back in the film days, at least when one said "film for a camera", they would have likely known what that meant, today it's all different matter. If you're lucky to run into a security checkpoint with some knowledge of traditional photographic materials, it is likely or at least possible, you will get your hand check inspection. When not so lucky, it will be run through the machine time and as many a more times as they choose, nothing one can do about it. And let's face it, airport traffic is so vast, security issues so instilled, they do not care about your film, they want to get it done asap and get another person through.
If there is a chance for a fix, it needs to come from film manufacturers and large on line communities with some ties to politicians, and needs to be directed at US Congress and EU Parliament to start with. It will require training for security personnel to have any chance at consistent interpretation of how film is to be handled. Proper signs posted at check points (every checkpoint at every airport) so it is clear hand inspection of film is a law. BUT - are we seriously thinking this is possible? How can they ensure what it looks like a film canister ... it isn't? I'm sure it is possible to develop a perfectly safe scanning techniques for ANY emulsion speed, yet this is not the 80's when there was film to be expected in most travel bags.
The biggest problem right now is the uncertainty of what to expect. One will go through with no problem, another will have his film pulled out just to be sure it is what it says on the box it is. Do you have a chance of getting it back, or even having a satisfaction of winning damages in court? No! And the sympathy today is with more thorough checks not moving back in time and have next to none.
To me, if there is any chance of having 100% safe unprocessed film travel, it will only come from different scanning techniques, not return of common hand inspections.