Tome of Eldritch Lore: One of the small number of amendments to the Imperial Charter amends the otherwise protected rights of “access to information, freedom of research and inquiry, freedom of speech and of the press” to include an exception “when such information or speech constitutes, in whole or in part, infectious or self-executing code”.
The existence of this sort of thing, in an infectious-meme, basilisk-hack (see: Brown Note) sort of way, is why.
(The Silent Library exists to contain this sort of thing. Can’t go around destroying them, obviously. They’re books.)