While browsing the list of badges, I noticed that some badges have never been awarded. For some, such as Constituent and Legendary, this seems like a reasonable assumption for this point in Worldbuilding's life.
However, one badge caught my attention, specifically because it's a bronze badge that has never been awarded: Tumbleweed. We have such an active and communicative community here that I don't see Tumbleweed ever being awarded.
Tumbleweed isn't the only badge that seems infeasible to acquire (Tenacious comes to mind), so is there some process by which badges are evaluated for their viability and what should be done with badges considered nigh impossible to acquire (if anything)?