of course its possible, nothing is impossible in this world, (apprently)

You only need to look at the defaced websites over at attrition.org to see some examples,

theres no point to it really, I supppose it could be used as the starting point of a bigger hack but theres usually better ways to do that.

Why dont you get another computer, a nic and a piece of crossover. Install apache on it (free) set up a website then try attacking that, its better cos its not illegal, you can increase the secuirty to make it harder for ur self, and u wont end up breaking rocks and sharing a cell with a 300lb monster called bubba who just wants to be ur "special" friend

Youll learn allot about security and admin this way,

i2c