I've been wondering if there should be a compilation of tagged verbs and gerunds in a tag group, something like Tag Group:Verbs and Gerunds. Basically collect any tags that end with -ing and designate them as a concrete verb like playing, washing and undressing; or an -ing verb that can be used as a gerund as well like building (making a structure vs. the structure itself), drawing (creating a picture vs. the physical picture) and wedding (the act of being wed vs. the ceremony itself). Likewise, nouns like slap, pose and wink can also function as gerunds.
I ask this because there are a lot of tags being used in the verbal tense, but there are instances where the gerund form is preferred. See forum #11808, forum #90186 and forum #56720 for examples. I think it'd be very helpful to have a tag group as well as some guidelines beneath each header explaining why a verb or a gerund is being used for this particular tag. If anyone wants to suggest a verb <-> gerund alias/implication, it would be helpful to have this tag group as a reference as well.
Off the record, it's amazing how gerunds are such tricky little devils on Danbooru.