One of the questions that recently popped up on the homepage had only one tag - twitter
According to the Help Center, only the following topics are allowed:
WordPress Stack Exchange is for WordPress developers and administrators to ask questions about:
- theme and plugin development
- development and management best practices
- server configuration for WordPress
twitter (the social network) does not fit in any of these categories, so why does it even exist?
It also seems there are various questions using that tag that are not to do with WordPress and have not been flagged. A good example is this question