[TeMPOraL]

Client-side AI inputs can be trusted no more and no less than player's input; same anti-cheating mechanisms apply.

Sure, if you can execute AI server-side, go ahead. But the GP asked about scaling it up, and this offers a trivial way of doing so.

[IanCal]

There are different actions that link to cheating though, so I don't think the same anti-cheating mechanisms will work across the board.

A player remaining still doesn't benefit the player. All the AI enemies nearby standing still does.