What is meta? ×  Before the introduction of bronze tag badges,
the only requirement for silver/gold tag badges was 400/1000
upvotes. This permitted a notable Tag-badges exploit, namely, a
single answer with 1000+ upvotes could earn any desired gold tag
badge. When bronze tag badges were added in September 2010, this
was accompanied by additional citeria for earning tag badges.
Quoting user waffles:  We would like tag experts to get the tag
based badges; we would like it to show long term commitment to
questions with a particular tag.  Proposed changes, to protect
against gaming and make the badge fairer    1. Automatically
take away tag based badges if the criteria is no longer met.
2. Require a minimum number of non-wiki answers in the tag to
get the tag-based badge (around 20 answers for bronze, 80 for
silver, 200 for gold) AS well as a total score.   3. [...]
Let's take a look at the consequences of criterion no. 2 for
five cases, using bronze tag badges as example:
A