Scripts go missing all the time. There are bunches of them in circulation at any time, color-coded. The color-coding isn't to find thieves, but to make sure everyone's working from the same script.
A friend of mine, back in the '70s, paid his way through college by taking old scripts and selling them, which couldn't possibly have been legal—but nobody cared. (Same friend is now the head of a major production company.) I mention this because this whole "nobody can see the script!" is a relatively new, and probably still a pretty rare thing. (I mean, do you suppose that the producers of, at random, "Fuller House", care if someone gets a copy of the script?) With certain high-profile exceptions, like the comic book/sci-fi stuff, "script security" isn't a big issue.
As Daniel points out, above, nothing from the Sony hack seems to have had any influence on what got put on screen, with the possible exception of The Interview being scuttled.
I've never heard of anyone being charged for losing a script, but I can't swear it hasn't happened. I saw the printing end of it a lot, and it seemed like there were always plenty of extras as a rule.