This may seem like a very strange pet peeve to some. Why does it matter if your friend does not stand up for you, when you have the ability to fend for yourself and seek other support systems? The one of many problems which teenagers face even in today's day and age is bullying. Sure, teachers and parents do not support bullying, but it still occurs and there is a difference when a friend is there for you and when an adult intervenes in the situation. Most teens value their friends' opinions and seek advice from them more often than they would from their parents or other adults. I feel that it is due to the fact that kids can relate more to kids their own age because they spend more time together during the day. Also, the bond of friendship can provide different emotional support than a parent can offer.
It disappoints and annoys me to see friends who are supposedly "there for you" enable bullies through being bystanders or even participating in the act itself. I feel that this is one of the most ultimate forms of betrayal because without the support of those who matter most, kids will begin to feel deserving of the bullying. Friends have a very powerful influence on each other and it annoys me when they sell their friends out for peer pressure.