Eventually you have to grow up or face a lifetime of useless rebellion. That is the branch in the road everyone has to take, especially in the world of punk rock. It is a culture that is founded on rebellion, on not following the established rules and on individuality. The problem is that while it is a life unto itself, you still have to follow the same path everyone else does and unless you are somehow independently wealthy, you still have to make an income and pay the bills like everyone else. The real challenge is learning the difference between rebelling for the sheer sake of it which is a pointless dead end versus harnessing it to make it work for you. Not all of us can be rock stars, not everyone of us is going to be a famous artist or designer, so what are you going to do when reality knocks on your door?
Yes, it's fun to sit with your studded leather jacket outside the mall and make fun of the shoppers coming out with bags full of useless shit but that's what you do when you're 15 or 16. That's an exercise to massage your still fragile ego and convince yourself that you are on the right path (which you are) but doing that at 20 or 25 makes you a bigger loser than the thousands of sheep inside. Spray painting bathroom stalls or other destructive acts are expected of kids, that kind of shit gets you arrested when you're an adult.
One day you realize that while it is fun to get drunk and play music fast and loud, you still have a whole life in front of you that you have to get through somehow. Rebellion without a direction leads you nowhere and only hurts you in the long run. There's nothing cool about being the oldest cashier at McDonalds or detailing cars for the rest of your life because all of your cool tattoos, lack of education or criminal record disqualifies you from everything else. There are few worse feelings than knowing that everyone has gone on without you.