In April of this year I flew with my girlfriend from Dallas, TX, to Miami, to Lima, Peru, then to Cusco, Peru. Even though I know it shouldn't have been a problem, I asked at each checkpoint to have my film hand inspected. I figured that way if I couldn't at one checkpoint, at least it would be less then what it could have been.
Anyway, I didn't have any problems at all. In Peru (I forget which checkpoint) when I asked in Spanish if the film could be hand checked, the guy looked sternly at me and said "NO!" Then he broke out in a big smile, laughed, and said "just joking." That was kind of funny, actually.
One guy did say, "you know, this shouldn't be a problem" while he was checking the rolls. I just said: "Yeah, but I'll be going through a lot of airports." To that he nodded and said: "yeah, that's true." He was actually quite nice. I don't remember if that was Dallas or Miama. He was an older guy, though.
I took all the rolls out of the packaging, even the plastic cansisters, and placed them into clear, zip-lock bags. I had them at the top of my camera bag so I could pull them out quickly. That seemed to really help to stream-line things. At least it was clear to them that I took as much effort as I could to make things as efficient as possible for them.
Some just quickly checked the rolls of film, others swabbed each and every roll and then placed the swab in their sniffer, I suppose for explosives. Honestly, I didn't mind if it took longer, and I think it was probably more secure anyway.
I think a cheerful, open disposition helps, and realzing that it will take longer, and not to try to rush the process helps a lot.
Though, we also didn't go through the new body scanners, and it sounds like some poeple were really harrased for not doing so, but we never had a problem at all. So maybe on this particular trip we were just very, very lucky! 😉