Hackers harm individuals not corporations.
Corporations are targeted by professional hackers for monetary gain. Only amateur hackers target individuals (unless there's something of value to gain from those individuals).
So why do we believe they target corps like Microsoft?
Monetary gain. Not all hackers break into systems for the fun of it.
What's clever about viruses or malware.
It's clever in the way it works when it works very well.
Simply, hackers are bullies
Not all of them are, some or criminals who want to make money.
PS: Stay away from the porn sites.
Why? Porn sites are plenty safe as long as you have certain plug-ins disabled. I use Opera, and have an 'Enable Plug-Ins' check box in my tool bar, and 99 percent of the time I have this unchecked.
That free offer to get you a larger penis, that's malware.
When surfing porn, simply don't use the ads, and focus on the content.