That Makes sense.
Unfortunately, I don't think this will work with most add-ons as it will submit the data to the add-ons as encrypted which would break the add-ons.
In a few months I will be looking at updating the Plugin to make each form optional to encrypt and which fields to encrypt as well.
That way you can turn off Encryption for Pay-Pal forms and other Add-ons.
Down the road I may look at how to enable it with the Add-ons, but that will be awhile from now.