Hidden Brain Functions

Basically: Time Traveling Criminals, their descendants, and even many of their associates have for all recent time, had their true brain functions (virtual or otherwise) hidden, so that their true thoughts remain undetected, and often, their brain functions are simulated to effectively moralize even their most amoral behaviors.

Note: Oftentimes, the associates of time traveling criminals, and even some of their descendants, do not know that this has been occuring.