Just my thoughts but there are to many doujinshi with this tag that just have 2 pages of more or less "stomping" rather than serious ashikoki.
Maybe I'm being to critical but just a touching it for 2 seconds doesn't justify an ashikoki tag.
But I would think that just giving tags because 1-2 pages or less have some foot touching or something from the other tags shouldn't be tagged so.
The tags should be for those doujinshi that clearly focus on the tags.
Sorry if this was discussed somewhere else before but when I searched for "ashikoki" I haven't found any topic regarding the tag.
EDIT: And don't get me wrong here, I like the tag system but its just frustating if I use it to find nice stuff and than its just 1-2 pages or less and the rest of the, for example 16 pages just something else like paizuri.
EDIT2: Maybe considering something like "stars" behind the tag to signal how hard it focuses on each tag would be a good alternative. For example 1 star stands for low focus and 3 for max focus.