Re: a failure to follow standard procedures
I have first-hand experience at a Fortune 500 company where merely doing a thorough peer review could get you a reprimand from management for "not being a team player" or "being a roadblock". Finding actual problems and rejecting a change request could get you short-tracked for dismissal.
Rubber-stamp it or else... In some cases managers would simply approve highly technical and complex change requests to key infrastructure themselves, even though they had absolutely no technical expertise in that area.