Look at the guy who so called hacked Sarah Palins yahoo account. It took just a few days to track him down and he tried to hide is tracks using several
websites to mask your IP. The average person does
not have the resources or power to really find someone, but a real tech guy, maybe. The goverment, yes if they want you bad enough. Now this happens
to yahoo accounts allot, so I don't see why they
went after him, just because of her, that is wrong.
If they track him because of her, then they should
do it for everyone..

It is almost impossible to hide your tracks today, you must work alone, do your homework and be completely careful about everything, buy computers with cash, be competely mobile, etc.. Allot of prep work needed.