Here we have 2 Moderation Badges for your consideration; Tag Editor and Research Assistant. Below is the description of each tag level, and a description of these two badges:
A Bronze badge is supposed to be "easy to get", yet with only 177 Tag Editor badges awarded I'd say it's really not that easy.
A Silver badge is "less common", yet only 4 Research Assistant badges have been awarded. I'd consider 50 Wiki edits to be an "important contribution", wouldn't you?
The only badge awarded less times than Research Assistant is the Legendary badge, which has only been awarded 3 times.
Is it time to bump these up a notch and make Tag Editor a Silver and Research Assistant a Gold?