We are generally not going to make up individual rules for individual words. I cannot predict the specific behavior of every Mod, but I am pretty sure that the use of -tard outside The BBQ Pit is going to get Mod attention.
ETA: While looking over the use of -tard, I found this statement
Given the context, I doubt that it would have been Modded. Similarly, no one is going to go back through this thread handing out demerits to those posting the word.
Despite the popularity of rules lawyering among some posters on the SDMB, the staff would like to think that the majority of posters have the capacity to make some judgments on their own.