The problem is, hackers can crack even well known trusted companies databases as happened with Sony Playstation Network. Millions of people lost their information on unknown hands, me among others.
One doesn't even have to go to some dodgy websites to risk their computer, any website which uses advertising banners can spread malware or viruses as happened in one Finnish portal / discussion forum. Good thing the antivirus programme stopped it but it took days before they fixed it. Was probably difficult to track down as it occurred only randomly but the reason was indeed an infected advertising banner.
As Michael Knight said in A Plush Ride, everyones information is somewhere in some computer, all you need to access it is to know which buttons to press.