Hooray for forward-thinking
Initially, we kicked around the idea of supporting multiple categories per topic (so, more like a "tagging" approach, as opposed to categories).
In the end, we felt that having a "middle-ground" between statically defined categories and user-defined tags was not a proper compromise (since it ended up not being greater than the sum of its parts), so we stuck with static categories.
A tagging plugin can be built, of course........
@julian that flag mechanism for posts will be very good.
We are having huge problems with Google AdSense as its all User generated content and we would love to be able to either
Hide topics from logged out and normal users
Hide ads on topics
On those topics if other users mark it as NSFW, or 18+ tag or flagged as 18+
This will be a huge help. We need this in core and I m sure many others do need this as well.
Google is getting very strict with its content policies now.