Curt
You want to create two maps.
In the one map for public consumption you want to load only MAPSERVICES as layers
This is an un-editable service. That map is published on FB
In the other map (for you to edit) you want to load the FEATURESERVICE or the FEATURE SERVICE & MAPSERVICE (Since feature services in v10.0 cannot handle the display capability for symbology that MAP SERVICES do)
If you don't give out that link to the Feature Service map then no-one should be able to get in and edit it.
If you're using AGO and have an account, you can also set the permissions on the map you create to NOT be for "everyone" and isolate the map to a group that is not "open" to even users with AGO accounts