... have ruined a bunch of my films.

I travel often and almost always carry a camera. After being periodically told that the scanners are harmless by the attendants, I sometimes just threw the films in, putting them in a separate tray from the camera.

This time it didn't work out. I figured out where it must have happened, I think the scanner stopped for a second or something focusing the ray right at few of the rolls.

So it really is worth it asking to have them hand-checked.