Hi john.c.cartwright, to hide services in ArcGIS Server you need to to open: http://gisserver.domain.com:6080/arcgis/admin
then click services
open folder with your services and click your service name. If you don't publish intro folder, click your service name. Scroll down the page and click edit:
and add "deprecated": "true", into your service, and click Save Edits:
Service will be restarted and hide in rest folder for public users, but if someone find full path to your service, He can open them.
Thanks for the clear explanation and pics on hiding services - I have a ton of services - is there a way to hide folders instead?
I am eager to know the answer to this question as I have tons of services too. Thanks!