We don't need to be worried about an AI that's going to fuck over humanity.
We have politicians that fuck over humanity every single day, like it's their job, and they actually get paid the big bucks for it.
Annnd people actually vote and re-elect these same fuckers into power every few years. 
While the highlighted sentences above are true, the dangers of an advanced AI becoming sentient and taking control are unknown and should be expected to be orders of magnitude greater.
We do need to be worried about it!
I'm still thinking after (human made or initiated) developments we didn't worry about in the first place and
did not cause us huge problems afterwards.
You're free to participate, i didn't remember any, yet.
