Elly, it has always been in the rules, in the Security paragraphs.
Don't use auto-refreshers or any other kind of programs or browser plugins, features or add-ons, for feeding your Knuffel, or exploiting any other ways of food earning / item gathering. Not only is it considered cheating to use these programs, but it is also a needless burden on the server.
This announcement is just to remind that they're gonna ban you if you break that rule.
All the stickies in the subforums are not in the rules page because they only apply to the subforum where they're located.
Rules apply to all KofK.