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HideCategory 1.0 - feedback requested.
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Does this plugin work "as stated".
see this frustrating discussion.
http://vanillaforums.org/discussion/19849/hide-catagory-posts-from-all-discussions-page#Item_11
I may not provide the completed solution you might desire, but I do try to provide honest suggestions to help you solve your issue.
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Answers
As I stated in the link mentioned: It worked like a charm for me.
@peregrine
It works. But I think it would be nice to have a button to manually hide just these predefined categories. Something like in the "OnlyRead" plugin which you also wrote.
Our forum for example: most categories are for normal discussions, but two categories are basically classified ads which some (most) users don't need and have trouble sorting them out. Such button would solve this easily.