
Its multiple states plus some countries too.
But anyway the law as it stand is not problematic to any one. When installing an OS and asked for birth date put any random date.
If the law require actual verification or make it illegal - for you as a user - to provide false date then its fascist in my book
The easiest solution is to format windows partition and mount it as separate mount point (for example /mnt/extra) and use it for storing any large files you have (movies, songs, books, photos, backups, downloaded files …)