There are Library of Congress approved reasons to bypass DVD DRM, putting libdvdcss in a gray area. Any exemptions that could apply to emulators either expired

There are Library of Congress approved reasons to bypass DVD DRM, putting libdvdcss in a gray area. Any exemptions that could apply to emulators either expired or are limited in scope to things not being sold. Your use of libdvdcss is almost certainly illegal under US law though, as absurd and ridiculous as that is.