Members with different interests, how to please them all?

[Ramsesx]

Following problem in my forum, there are some members only interested in facts but not in off topic stuff.
So, my idea would be, there should be a button "only facts" and one button "all forum content" so you can switch every time to the preferred site view.
If the member is switching to the "only facts" view, all off topic stuff should be excluded, in forum view, new posts, today posts, search etc..
I know there isn't a modification for this and I know there is a modification a user can exclude some forums from the new post view but most people don't know this function and your are still able to see the other forums.
Is this an issue on your forum too? If yes how did you solved this problem? Any idea is recommended, thanks.