Aside from that, cryptography, being a security measure in a way, attracts more paranoic, sometimes even the so called delusional "conspiracy theorists" (although let's not forget that it attracts normal people too). Add the paranoic crowd + the tech (and other) flaws and you get the topics mostly discussed in your mentioned sections.
That doesn't explain dank.
I'm sure dank isn't crazy and is just an elaborate troll. Was he always like this before he defaulted on the loan? I think it's just an act and he's just messing with people here as he's got nothing to lose now.