I know I can check to see whether a PDF is opened in Window or Mac or Unix but can it check to see if a PDF is opened on an iPad or Android mobile device?
I'm thinking it would be nice to display a certain way depending on what kind of device it is being open in. For example open as spread on a desktop device or open in single page mode on a tablet device.
You could look all the form fields and have a ro visible field and then use a document level script of page open script to hide the warning field and unlock the fields.
This is tricky to setup properly with Acrobat on a computer, but it can be done,