Going back just one lifetime
If the original computer crackers had a crib they'd be in in a flash with all the data collected over the 3 or more days (that it used to take to "crack-in") exploited. Good enough to win battles not good enough to prepare for them.
Do you think they can't plant similar cribs in every anachist's group known?
Today if the NSA wants your information they only need to plant such cribs using their own account info.
If they wanted to know how a bank encrypts their data, for instance, they open an account with the bank. They then know what the coded data says. How long do you think it takes to break every code in every bank with the sort of funding the NSA and GCHQ enjoys?
But it is even easier than that. They know how the banks work. Every government agency is migrating to Adobe back ends and what isn't on Microsoft XP /Blackhelicopterhat wearing Linux servers is not worth getting (but they get that too anyway.)
Ditto for any Iranainetc computers that have any sort of prefabrication from the USA or its ally the Democratic People of China. If they can tell what books you have been reading over the last 13/14 years they can do everything. Why it took Snowden to point that out beggars logical reason.