Weeding — Love It or Hate It

Whether a library employee has taken a collection development class or not, most people working in a library have either heard of the CREW method of weeding materials or use the acronym MUSTIE when removing items from the collection. However, judging by the number of pictures posted to Facebook (of outlandish items still found on library shelves), it seems that not as much weeding is being done in libraries as should be. The question is, why are some of these items still on shelves and does a lack of weeding mean something more than it appears on the surface?