While we are talking tags, before I forget: I suggest we blacklist [tag:java] and [tag:c++] -- I have not seen it used on an ontopic question in ages, and blacklisting may discourage folks to post their questions in the first page.
I remember I proposed this once but we decided not to do it because there may be ontopic questions (e.g. language design). I still think that such questions should not need the PL's name as tag. The only set of questions I have in mind that is valid are a couple of Prolog questions; they could do with only [tag:logical-programming] and without [tag:prolog], I gu…