TheLamer: At least this would be clearly against the User Agreement (no computer help when playing), so any punishing measure could be taken against the people who would abuse the system in that way.

nabla: Sure, that would probably result in a ban, because a proof would be pretty easy, though the whole idea might be used for broadcasting games here instead of replaying them or sending to site creator for publishing at least then.

Although the proof would be almost impossible if the action would be within the limits, with bigger and non-constant intervals between moves, there is no way to discover that, except some AFK check where user would have to reply within some reasonable time to some sophisticated question in a human way while playing. But the decision when to generate such question and what is a reasonable reply regarding to content and reaction time would be not easy.

On the other side, implementing of AFK check would be probably lost time, because it would catch only those really greedy ones, because classical way of switching to interactive mode when AFK check encounter would be sufficient as prevention in most cases.