Personally I think it is nonsense. A simple answer like
"Convertlit will allow you to turn an encrypted LIT file into its decompressed state."
Personally I assume people are smart enough to see if they have the right computer, hardware, book format and
rights to use something. In other words, brains.
Failing that, this should finish of any such reactions:
"Convertlit will allow you to turn an encrypted LIT file into its decompressed state. Only allowed in some countries."
Or if you want to be a total sadist
... put this in your signature:
"All my forum posts are dependent on location and subject to law... bla bla."