This is more of "Would someone please think of the children" fallacy in-action.

This was already thoroughly discussed, and the consensus was that privacy needed to prevail. You can either have privacy, or you can open the doors to invasive content-scanning. If you let them scan for one illegal thing, that opens the doors for them to scan for anything they want.

Examples of how this could slope down:

* Oh, you took 30 seconds of video at the Taylor Swift show? Since we let governments scan your private data, we're now compelled to forward your PII to the RIAA.

* You have Metallica mp3s from 2001? Since we let governments scan your private data, we're now compelled to forward your PII to their lawyers.

* EXIF data shows were driving on private property? Since we let governments scan your private data, we're now compelled to forward your PII to the township.