In times of Vista, probably MS has better things to do (as an example make this huge piece of bloatware work) than to chase the (illegal) users of what can be definitely called "Abandonware".
But still, some form of Legal action against unauthorized users is still possible, as I see it;actually some files have NO EULA at all, so my guess is that they can be used safely, and some are legal for users possessing a 9.x/ME license, remember that the original scope of minibox still remains unchanged:
provide legitimate Win9x/Me users a supertiny win 3.x-alike OS using only their own 9.x/Me files and legally available/redistributable files
There are already a number of (better?) Windows 3.x from floppy projects easily available on the internet, the thing that will (if ever fully released) minibox different from the rest of those project will be that we learned a bit about Windows 3.1 (while having some fun

) and that it will be possible to replicate the mini-OS in a legal way (as said for legitimate Win9.x/Me users ONLY).
jaclaz