I don't know what this thread calls for: mollycoddling or just laying down the law. I think I'll go with the latter.
Should I be sympathetic to the fact that it's Creative Commons? Yes, but that still doesn't mean tracks will get stolen: tracks STILL have to be attributed and not be put for commercial use, and you could still make a claim on stolen audio. Of course, the questions beyond that all involve one bigger issue: royalties? Of course, I too, have to deal with the fact that I can't share every single audio track I've made as a result of this.
Should I be sympathetic to the fact that you completely missed the part in the T&Cs about Creative Commons licensing? Following my lawyer's instincts, NO. In contract law, the general rule is that 'you are bound by what you sign', and the same applies for when you join a site -- you accept its terms and conditions, and that means you read them in their entirety.