I think pnl, you're missing something quite important from life...
You are surely old enough to be a master of your own destiny... shouldn't you be learning how to look after yourself, and be able to accept responsibility for your actions...
i.e. you take out a loan/credit agreement, be it a credit card, a bank account, a mortgage or whatever.. they say.. Please pay back within the terms you agree to, otherwise it costs us to chase you, and after all, if it's not a big enough charge, what is there to say you wont just keep not paying back... if you don't pay back, you get the charge...
I think that job sounds good.. bringer of pain... that's about right...oh yea, i'd be responsible for that BMW one of your mates bought... maybe they couldn't have afforded it, and shouldn't have been leant the money... but if they lied and said they didn't have 'x' outgoings...that's our fault why?