As I think I have mentioned before...
...but apparently the censors used to think that they would react brather well. The original video releases of the trilogy in the mid-80's were given the (video only) certificate of U/c- which means Universal, but especially suited for children. A rating you would give to, say, a Teletubbies video (or in those days, Care Bears or Playschool).
I don't THINK they ever destroyed a planet or hacked off any limbs in the Care Bears, but I could be wrong...
The censors later realised their mistake and gave them films a more general U.