Forbidden tags (or, nothing shall come of nothing)

[tiny-tim]

I tried to add the tag "nothing" to a thread about nothing, and got a refusal:

Tags cannot be overly common words (nothing).​

What's so common about "nothing"?

 

[Borek]

Nothing.


OK, more seriously. Common words are probably selected due to the frequency with which they are used. The more frequent the word, the less it says about the content, thus ignoring it won't hurt.