Late, but: that honestly sounds terrifying. News (especially on a scale that an international community like this one could follow) is often either mundane or inevitably leads to heated flame wars about politics. I've already had one topic locked up; I don't need another... ^^'
The only news I could think of that wouldn't suck would be science news...I'm not really sure how that would go...
Take courage! If it's not against the rules, there's no reason anyone should be bothered unless they want to be. And if someone wants to be bothered, that's their problem, not yours. 
I think you're misunderstanding the issue...it's not just about having discussions about certain topics, it's about having them with a community that will take them in a certain direction. Starting my psychology-related topics in a psychology-centric forum would not have been the same experience (it probably would have been worse, tbh... ^^')
I want to discuss these things with other writers and artists, plain and simple, because they will look at them in ways that writers and artists will.
I am an artist and a writer, and I enjoy thinking about all kinds of things. Often, these seemingly random things are what inspire my work. I've been doing a lot of research on metallurgy lately: crystal formation, mining processes, gemcutting. Is it because I'm a mineralogy nerd? Not necessarily. In truth, it's because I'm writing a story where I'm using the concept of metallurgy as a theme.
Similarly, I was doing a lot of research on clouds once upon a time, and not because I was a meteorology nerd. ^^ It was just more inspiration: I wanted to design a series of characters based on clouds, and I needed to know more about how they look, form, and behave. I look at these topics in a way that an artist and writer would.
I don't understand how anyone can deem certain topics 'unworthy' or 'irrelevant' in a forum that's supposed to be for artists. I repeat: fiction, and art as a whole, is about EVERYTHING. There is no topic that is exempt from the touch of artists; we channel the universe into our work. It's what we do.
The only way such criticisms would make sense is if this were not a forum NOT for artists and writers, but for art and writing INSTRUCTION. A school, then. And so far, no one has proven to me that this is the case.