How to set Map Package as read only?

[Savannah2019]

My organization uses ArcReader and find it very useful. ArcGIS Online is great and all, but there are limitations. I've been trying to play with sharing a Pro map as a map package to a few computers with a basic license as a potential solution, but how do I set the map/data as read only? I don't want end users changing a thing.

Sorry if this is an obvious question, I just can't seem to find an answer!

Also, side note - a map package still requires users to have a creator license. Is there a realistic read-only replacement to ArcReader? I have several maps that link to folders on network drives that I can't move to ArcGIS online.

[Robert_LeClair]

So I've looked into the question of an ArcReader alternative and there appears to be a Windows/iOS/Android app called ArcGIS Explorer.  There is a product page located here with Home, Help and an FAQ.  In ArcGIS Pro, you create a Mobile Map Package and then use it in ArcGIS Explorer.  By its design, a user cannot edit the data in ArcGIS Explorer.