My favorite factoid about the Unabomber is that he was somewhat well known around the Montana town he lived near, as he sometimes came in for groceries and volunteered at the library. The FBI interviewed a bunch of town residents about why they didn't feel suspicious about this weirdo living in a cabin by himself in the wood and being a creepy recluse. The people in the town were like "Uh this is a town in the middle of nowhere Montana, that sort of lifestyle isn't unusual around here, it's sorta WHY people move here".