Any large system can be undermined by a small actor imposing a miniscule change. It just depends on which component of the system is disrupted. Granted your op

Any large system can be undermined by a small actor imposing a miniscule change. It just depends on which component of the system is disrupted. Granted your options dwindle as the disparity grows, but so long as a component is accessible to an actor, the system can be impacted.