The artist eudetenis (though he's probably not the only one) often puts a whole bunch of chibi characters in the corner of his artwork, presumably as some kind of watermark. These characters are usually tagged which is usually desired on this site, however in these cases I don't think it's desired at all! No one who searches for idw_(girls_frontline) is looking for post #3439263, because it doesn't have anything to do with IDW. This artist appears to reuse the same characters quite often and it seriously messes with the search results for those characters that have a low number of posts.
Could we please have some policy change regarding the tagging of these "watermark" characters who happen to be in an artwork but aren't actually relevant to it?