If I don't trust them to report their rolls accurately, why am I gaming with them?
I game with my players because they're my friends.
Why would I call them friends if I don't trust them?
That said there was one person I gamed with whom wasn't my friend that I had 0 trust in his "rolls". He had a known habit of reporting rolls as the lowest possible because for him consatant crit failures were more fun.
I don't game with him any more.
Hey they can lie to themselves without their lips moving!Q. "How do you know the player is lying?"
A. "Their lips are moving."