YES!
Yes if you get hit with one it will hurt
Because the air pump in a bb gun makes the bb feel like a pinch
No
Yes
No.
Hurt, Yes. Kill most likely not.
Yes it could cause problems.
YES! Very much.
They can, if someone conks you with a BB gun. A shot BB can hurt like crazy, depending on its speed and the location it hits you. If the BB hits your eye, then you stand a very good chance of being blinded. In the Army, I was hit on the knuckle of my thumb with a BB fired from a low-pressure Daisy Red Ryder . . . it carved a nice half-sphere right out of the knuckle bone. Imagine what a CO2 or multi-pump BB gun could do!
It is not likely, but it IS possible. Depends on the bb gun, distance, and where you are hit.
70 FPS is considered low for a bb gun, of course if you were shot with it it would still hurt.
Yes it does hurt to get shot by a BB gun, due to the hardness of the plastic pellets, and the speed they travel out of the BB gun. The effect only lasts 2 minutes depending on what type of BB gun was used.