Just to point out that human "smashing keyboard" is far from random. Even if it weren't due to the keyboard's fixed layout (between two smashes), it's largely

Just to point out that human "smashing keyboard" is far from random. Even if it weren't due to the keyboard's fixed layout (between two smashes), it's largely because of our non-random nature — a human being cannot reliably output random objects even in thought / speech. Don't ask me why (I don't think anyone knows or could prove it theoretically) but it's been verified countless times (war secrets help make such research important). We're at best capable of pseudo-randomness mathematically. Some controversial neuroscience even places us far into the deterministic scope. A child is probably way more determined than an adult for that matter, due to a much simpler schema of reality, with 'weird obsessions' (e.g. it feels nice to smash the same place over and over again, our brain is quick to play games like that, such as walking on specific tiles to avoid the lava in the street). I wouldn't trust most animals to output randomness. We have crypto packages suited for that purpose. ;-)