Planet KDE and similar sites exist to show the people in the communities, what they are working on and what their interests and characters are. It’s not an official news site like KDE Dot News and it’s not even on the kde.org domain which I find disappointing. Posts on topics outwith KDE are encouraged as that gives insight into our friends we work with and builds community.
Some Planet sites take that a bit too far with people posting daily updates on what they had for breakfast each day which is just boring so we long since added a rule that the majority of content on the feed should be about KDE, but not by any means all of it.
A community where people are afraid to politics because they might annoy people is a scary community indeed. One of the problems with the EU and indeed the referendum the UK is having is there is precious little discussion about it, even though it affects the future of the UK, everyone in the EU and indeed everyone in KDE.
From the policy which you can find under Add your Blog:
The majority of content in your blog should be about KDE and your work on KDE. Blog posts about personal subjects are also encouraged since Planet KDE is a chance to learn more about the developers behind KDE.