Concerns of the levels of radiation being safe or unsafe doesn't matter to me. What matters is the fact that numerous experts have proven the scanners to be completely ineffective at stopping threats and that is what people should care about.
Why expose yourself to the radiation in the first place? I refuse these machines every time I travel domestically and if they are required by some other country I'm not going to go there just wish everyone else did the same.
Humanity has the stars in its future, and that future is too important to be lost under the burden of juvenile folly and ignorant superstition. - Isaac Asimov