While i see where you are coming from, we did try this in the past for a few months with the [COFFEE] threads, thinking that people should be able to discuss anything, not necessarily related to personal finance and so on.
Sadly, the result was a failure. You can dig deeper into the reasons here, but i will quote myself on these threads:
Now if you have a better suggestion I am all ears. Again, i used to think that people should be free-ish and talk about anything. But i haven’t seen any satisfying result so far.