Thanks for that; a very thorough overview I hadn't read and it saves me going through wikipedia to find some examples for the (reasonable) request in response to my previous comment.

I should point out that there are plenty of editors who lean left that make genuine attempts to keep it out of their editing and are as frustrated as me about those who don't; I genuinely suspect it is an editor-demographics numbers thing that causes the imbalance as much as anything, as previously stated.