Automating those kinds of notices would generate a lot of notices. Everytime a Moviestock IPOs with SBs attached, notices. There are almost always cast changes in major projects during the course of development and even during production, notices. I think you may be underestimating how many notices would be generated.
Also, page views are a souce of income for the site. Those kinds of notices could reduce page views (this would depend a lot on the details of the notice system).