Maybe because it's easier to boot it everytime from USB wherever you are than to...

mdrzn on Sept 23, 2016 | parent | context | favorite | on: 'Mr. Robot' may be fiction, but its hacking plots ...

Maybe because it's easier to boot it everytime from USB wherever you are than to have an OS installed with information about you on it. Also, I guess they use it daily for hacking purposes and happen to check the mail on it.