Depends on who you're trying to hack/hide from. If I'm hiding from governments, political parties, or NGOs, then I might do something like you suggested, but s

Depends on who you're trying to hack/hide from. If I'm hiding from governments, political parties, or NGOs, then I might do something like you suggested, but since the greatest danger to hackers in terms of getting caught is other technologically-literate people, I would favor planning using tools my enemies are less likely to bother checking. Plus it means you don't have to rely on either your own coding expertise or the trust you have in your collaborators. If you're doing something illegal, there's always the trade-off of including more people in order to cover holes (since you might be working against whole teams of people and their brains), but then you're subject to your collaborators either making a mistake or selling you out. Letters are: A.) Illegal to tamper with, so unlikely to be caught randomly or subject to things like hacks of their own. B.) Possible to send or deliver without another human being touching it, seeing it, or saving it. C.) Possible to destroy quickly and in a way that won't leave traces. D.) Will still function even if your network/code is taken down. Then again, I'm too risk-averse to hack so I'm the person who would accept things taking twice as long as long as our risk decreased 1%.