A counter would have to be increased with every load of a page; this wouldn't necessarily be difficult to implement, but it would have *no* rate-control. It would literally increase for every single click. There would have to be some rate-limit, such as by IP, but that's an area where NNF is lacking (no database). It's something I've been noodling; but without outright embracing a database, I'm not sure of a simple, reliable solution.