Have shrink-wrap licenses really been tested yet?

Besides which, if this is data we are talking about, then AFAIC it would come under exactly the same 'fair use' clauses as any other digital data I may purchase, CDs, DVDs etc. If I choose to (legally) convert my CD-based .wav data to some other (.mp3) format in order to play it from my car's stereo, then I can't see how converting my CD-based .garmin_map data to some other (.empeg_map) format in order to view it on my car stereo can be any less legal