I do not think we need to know the exact number for the purposes of this discussion. Considering the very existence of this site and similar sites, where you have a complaint board with members that actively search of news stories, blog posts, etc of complaints, the fact that you have yet to find a single instance of a pump being damaged due to the scanners is quite remarkable. While I agree it may be impossible to know how many have been broken, how improbable is it that none of those people with broken pumps have made it known? Even now with this news story no one is coming out with their broken pump story? What is the likelihood of that?