Anti‑Link–Spam for Wordpress is a very crude plug‑in that blocks all comments containing 5 or more URLs. In fact, it’s cruder than that; it will block all comments containing 5 or more instances of the string ‘http://’ — so it’ll block mis‑directed BBCode ‘[url=]’ spam as well.

It’s not pretty, there’s no configuration screen (you can change the hyperlink count by setting a variable in the code, and edit the HTML of the error message as well), but I’m confident it’ll reduce my comment moderation burden.

Download Anti‑Link–Spam 1.0 for Wordpress.

Please consider this plug‑in code free. If you wish to take it and transform it into a full, configurable Wordpress plug‑in then you’re welcome, though please provide attribution for this original effort.