What should I do to help my cousins?

Ok so my entire family pretty much (with the exception of me and a few of my older cousins) is very strict and uptight. Words such as 'crap' or '' are somehow viewed as curse words. I've managed to avoid this bug - I can actually have a rather foul mouth at times by normal standards. But my younger cousins (I'm talking 15, 16, 17 years old) get harshly punished for saying words that aren't even considered to be swear words. And it doesn't stop there. They're not allowed to listen to music that has swearing, and pretty much every good type of music has it's share of swearing. They can't watch TV channels such as MTV or Comedy Central, and aren't allowed to play video games that aren't rated for Everyone. I know this isn't my problem, but I just hate to see them being held back from fully experiencing their teenage life because my aunts and uncles are holding them back with their strictness. I want my cousins to be able to live out the full experience, from partying to going to concerts and the whole nine yards. How can I help them out?