Photography

I think a lot of communities start out as a single group for a wide range of content related to a topic like photography, including gear talk, photos, industry news, howtos, etc.... When they get to a certain size, discussions start getting lost in the flood of content and it makes sense to fork more specialized sub-communities.

Forking too early leads to a bunch of dead communities with a handful of posts.

I think that's a wise approach, it's too early with people adopting new platforms. I do like @Melon 's idea of suggesting photo-only posts come with some context, or insight into the post. Especially if folks happen to be sharing other work that isn't their own, but that's another topic altogether. I doubt we'll hit spam levels of posts soon, but it would at least guide the community in some regard.