Wikipedia is not a usage guide! --LMS
But it is an encyclopedia, and mention of "singular they" is relevant to the discussion of English language, and in particular English grammar -- I'm not saying "use the singular they" or "don't use the singular they", I'm just noting it is a phenomena of (at least some people's) English grammar. --
Simon J Kissane
I'm not convinced. You are talking about English usage. There is a lot of encyclopedic information you can give about English usage. The issue about "singular they" is one that belongs (is always treated) in an English language usage guide. --LMS