a computer is only as clean and safe as the user using it. regardless of anti virus programs and firewalls, a dumb ass will still forget himself and the comp up.
on that note; a car cant kill you if you lock it and throw away the keys. airbags wont help much when you bluntly drive off a cliff.
isn't port 80 open on nearly every web server? if it was really that easy to just "hack away" then there wouldn't even be an internet
you would need alot more exploit with then just a port number.
an exploit like... a dipstuff kid that clicks research adds and fills the comp with all them fun viruses
firewalls, vista defender, anti virus programs don't work when your always clicking the "yes" button to bypass them