How are you flying with film?

I've recently started playing around with film photography.  Now regarding my unprocessed film, should I tell the TSA agent that I don't want the filmed to get zapped with their scanner?  

Are they generally cool with that or is this just asking for a cavity search?  
If you have any recent experiences, do tell!  

I haven't flown with film before, but I think they will likely just use their wand thing and have you walk through the machine 

If you're that concerned, maybe sending the film in a package to your destination, to be picked up by you when you get there. When about to leave for home, sent the package back to yourself. I went totally digital before they got this crazy with scanners and X-Rays. I still worry about sending my cameras and memory cards through the scanners and do my best to get them to manually look through my camera bags without scanning them. But then I haven't traveled in about 5 years.

Wrapping the film in several layers of Aluminum foil should block the radiation, but it will show up in the scan as an opaque block that would likely cause them to investigate further.

Me, I have many metal and plastic parts in me. The last few times that I flew, they had the walk-thru scanners in place and I told them about these pieces before going through the scanner. One time, the guy running the scanner acknowledged my comment and waived me through anyway.  As I was walking to my bags after leaving the scanner, he yelled out "Man, you twinkle like a Christmas tree" loud enough that everyone stopped to see who he was talking to. A bit embarrassing, to say the least.  I consider myself to be somewhat Bionic now with all of these replacement parts in me, but they are keeping me going. I've had 7 heart surgeries, have a pacemaker now, survived cancer twice, a few plastic arteries, and metal knees. None are as good as original, but way better than not having them when they were needed replace my damaged pieces.

Charley

Back when I flew with film, I would place the film cannisters in a plastic zip lock and asked for it to be hand inspected. It only affects high speed film for the most part. ISO of 100 would probably not have issues. I remember a test in a magazine where they ran the film through 10 times with no noticeable effects. Don't know about the machines they now use so.....

In my film days they had bags laces with lead to protect against fogging. 
But even in those days (30+ years ago) the authorities said that the radiation levels were reduced many times as they brought out new levels and that it should not affect film anymore. There was still people that worried, as they said they needed to got though 10 or more scans to get home, yet they promised it should be fine. 

Haven't flown with film