I know you can turn off your casting call but they all still shown on my page?!
They still show on your own page so that you can refer back to them when you need to, but I don't believe anybody else can see them. When I go to my profile and click on the Casting Calls link next to the clapperboard icon at the top right I can only see my active ones, but when I click on Your Casting Calls on the drop down menu I see the full list of both active and inactive with a red header above the inactive ones. I sometimes set them Inactive while sifting through applicants then Reactivate if I don't find anyone suitable.