"Despite these inefficiencies, there are a few places where typewriters still clack away. New York City police stations, the desks of a few stubborn hangers-on, and, increasingly, the apartments of hip young people who have a fetish for the retro."
And those who have a passing interest in securing certain types of information. [0] Why? Each machine uniquely fingerprints a typed document making it easier to trace leaks. [1]
[1] "Unlike printers, every typewriter had its own individual typing pattern which made it possible to link every document to a particular machine, Izvestiya said."
Agreed, though I think the idea was also to remove the chance of any snooping via elint. I do notice the Ruskies choosing electric type writers probably for reliability and evenness of the print output. I remember the IBM Selectrics [0] I used hacking up for "text repro", [1] far superior to manual typewriters that had, depending on the quality of the machine uneven application of ink. If you scan a copy you get superior reproduction.
[1] To make print ready artwork you can type up the text, print a negative and reproduce positive film copy to work with. Old school optical reproduction technology.
And those who have a passing interest in securing certain types of information. [0] Why? Each machine uniquely fingerprints a typed document making it easier to trace leaks. [1]
[0] https://duckduckgo.com/?q=typewriters+security
[1] "Unlike printers, every typewriter had its own individual typing pattern which made it possible to link every document to a particular machine, Izvestiya said."
http://www.bbc.co.uk/news/world-europe-23282308