Its not that we want to see the site strictly Z focussed, as of course that would be rather dull, and there are various interjections from lots of members with non Z related topics.
Its great fun reading a sprinkle of non Z related articles on the site, but there comes a point when there can be too much, and when its considered too much from one person, we have asked them to reign it in a bit, so at least everyone gets fair crack at the whip with off topic posts, without the site appearing to be overrun by them. Its only fair isnt it?
We wouldnt ever want the place to be Z only straight down the line as it could be very boring, but we dont want to replicate facebook either. Its trying to draw a happy medium that is tricky.