If I knew how to hack, I wouldn't go around hacking websites for the fun of it. That's like going around shooting a gun for fun and no reason just because I'm able to pull the trigger or doing drugs because someone is offering it to me. It's illegal for a reason.
Yes, hacking a site, without the intention of taking anything can, be a valuable tool in increasing internet security. With the growing number of security breaches reported in the news, I believe it is important for "white hat" hackers to test security flaws in computer systems. By finding these holes in the system first it can better our chances to prevent criminal hackers from doing real harm.
Yes, I would hack a site just to see if I could. Not all hackers are malicious, some use their abilities for good and some just like the challenge to their skill set to see if they can take down big websites. I imagine if I was a hacker, hacking into Obamacare would prove to be quite the challenge and something I could brag about to my hacker friends.
EVan if I knew how to, I would not hack a website. I believe that websites are property, just like physical property we see around us. Therefore, hacking a website would be at the very least unlawful entry onto either a private citizen's or the government's property. I am not interested in the consequence of such a transgression