I don't have any kids or younger siblings, but I don't think that ANY player should be treated this way. Unfortunately, there are those people who will abuse, cheat, or rob others of what is rightfully theirs because they are too weak or cowardly to earn it themselves. It's a sad reflection on the real world. But, fortunately not everyone is like this. There are some decent great players out there, who do treat others with understanding, patience and respect. You need to look into a clan that you and your brother can join that doesn't tolerate this type of behavior and works towards helping each other. Otherwise, always make sure that you or your brother are the fireteam leader.