Yeah, I ran in to the same thing when I came back from New Orleans after Katrina, although in this case the TSA people were very polite and swabbed all 70 exposed rolls by hand.
On the other hand when I flew out of Heathrow, London the lady at the security point looked like she was going to gut me like a fish, when I asked her to check 10 fresh rolls of Delta 3200. When she insisted that it was safe for them to be run through the machine I told her to just throw them in the trash, since they would be ruined.
I'm taking about 70 rolls down to NZ. If you want to make your life and everyone else's a lot easier there are two things you can do.
Show up 1-1 1/2 hours early to give yourself time for the inspection.
Take all rolls out of the plastic containers and dump them in a giant ziplock or storm bag. I put a strip of masking tape marked 1600 asa on the outside and inform the TSA that these need to be hand checked because they are being push processed. There is a certain amount of truth to that since I really do push Tri-X to 1000-1600 on a regular basis.