If I remember correctly, a backup of database is in a public folder, so anyone can download it. Some people do it, to run analysis and do some interesting science/tech projects. If the FBI and the Interpol put the wikimedia people in jail (thats not going to happend), anybody in a country withouth extradition treaty to USA can recreate it.
So, the wikimedia organization can be killed, but the data is public and mirrored "enough" so probably can't be killed as easy.
Random link (not related): https://tahoe-lafs.org/trac/tahoe-lafs