When Someone Picks on Someone else... How do you feel n what should you do

When someone is picking on someone else,  Its hard to watch, so You can tell them to stop and to shutup ands then mine parents would kill me if I didnt put  in that your posta tells an adult acuz when mine bruthers hit me they say dunt hit back jus tells an adult so im assumin you tells an adult if sumone is pickin on dem too, sometimes you can step in and pick on the person thats not  being picked on, but theres a huge difference between fun picking and  mean picking .. and sometimes its a really close line