If they are advanced enough to visit our planet, they are probably want to study us more than anything else, pretty much like when we want to study animals in our own planet. And the best way to study those 'animals' is to not let them see you, right? They won't make contact with us perhaps because they couldn't find the effective way to communicate with us. I mean, just like we can't find the way to effectively communicate with the animals in the jungle we are studying.

If you don't believe me, just ask Lars.

the poor guy would not jump from the building, he would buy a gun, take it to his office, kill bunch of random people who happen to be there, and then kill himself.. mod me down all you like, but in a few months it will be office shooting again somewhere, as it always have been.

it says most of those who're leaving have Master or PhD. Master takes 2-3 years, PhD takes 4-7 years. So those people most likely started their H1 when they are around 25-30 years old.