One problem with the tagging system is that it gives equal weight to all tags; for example, a story which is mostly set in a single fandom but draws on characters and ideas from others might be tagged for all of the fandoms, leaving readers to discover that (for example) there is only a [[Harry Potter]] tag because the author needed a dentist in one chapter and used Hermione Granger's father, without any reference to magic etc. Some stories seem to be deliberately over-tagged to suck in readers for as many fandoms, ships etc. as possible.