Yes.
While BB guns are low powered and are not designed to do serious harm to a human, under just the right circumstances serious injury or death is possible. A shot from a short distance into an eye is guaranteed to result in permanent loss of sight and the pellet may go through bone and into the brain. In other words, you'll shoot your eye out, kid.
BB guns should not be fired at people. That is what airsoft is for, and even then proper safety precautions must be taken to avoid injury.
When used properly for target shooting, BB guns are safe and a lot of fun.
Yes it is passable to kill a Crow with a BB gun
You can kill rodents with a BB gun
yes i have killed possoms with a bb gun
It's extremely unlikely, but that doesn't mean it's "safe" to fire one at someone because it's "just a BB gun".
Insects
BB guns are NOT for hunting. It will not kill a deer. The Answer is NO.
It is not likely, but it IS possible. Depends on the bb gun, distance, and where you are hit.
yes basicly any gun can kill you
Arguably no, since you can only torture a possum with a BB gun, not kill it.
yes
Yes it is possible
The Crosman C31 is a CO2 powered BB gun. In general, a BB gun does not have enough energy to kill a person. However, as a matter of general principle, it is not a good idea to shoot AT anyone with a BB gun, pellet gun, or a bazooka.