Like others have said, you are not prohibited from hunting squirrels or rabbits with a .22 rifle, but I could see a person conducting a safety course telling folks that they perhaps shouldn't do that, given the safety issues.
In younger days, we only hunted squirrels with a .22 (and kinda looked down on those who used a shotgun, since it didn't seem sporting), and when in a group hunting rabbits, one of us often carried a .22 for sitting rabbits. I've also killed groundhogs, fox, and even muskrat with a .22. But, we were all taught the dangers of shooting anything with a .22 that wasn't on the ground, with the travel distance of the bullet.
One of the best shots I ever saw was my older brother shooting a rabbit that was running through tall grass, we could only see him at the top of each jump, over the grass, and he timed and led the rabbit perfectly and hit it right in the heart at about 20 yards. Those were the good old days. Now there are so many houses that have been built in the places we hunted and it wouldn't be safe to do things like that anymore.
In younger days, we only hunted squirrels with a .22 (and kinda looked down on those who used a shotgun, since it didn't seem sporting), and when in a group hunting rabbits, one of us often carried a .22 for sitting rabbits. I've also killed groundhogs, fox, and even muskrat with a .22. But, we were all taught the dangers of shooting anything with a .22 that wasn't on the ground, with the travel distance of the bullet.
One of the best shots I ever saw was my older brother shooting a rabbit that was running through tall grass, we could only see him at the top of each jump, over the grass, and he timed and led the rabbit perfectly and hit it right in the heart at about 20 yards. Those were the good old days. Now there are so many houses that have been built in the places we hunted and it wouldn't be safe to do things like that anymore.