I’d been thinking about that as well, Jonne. As an ex-editor, it was irritating me. My personal preference is strongly for capitalisation of the first word only, i.e. from your examples, ‘How we communicate’. Lots of capitals are ugly on the eye and tend to jerk the flow of reading. (Of course, words such as Diaspora would always take a capital.)
I didn’t want to start changing things however as it was my opinion, but it would be good to have an agreed standard. Whether we need a vote or not, I’m not sure - let’s see if we can get agreement on one form without it.
I’m for capital on the first word only - who agrees? Who disagrees?
I could try to dig up or produce a draft ‘house style’ which could be put on the wiki so that prospective editors could check it so they know how we want things styled in general.