What to do to Hackers?

You can't do anything unless they do something. This has already gone to Federal Court.

Here's a reference for you.

http://www.securityfocus.com/templates/article.html?id=126

You can't do anything more about port scanning than you could about someone driving by your house because they "may be" casing it. You can report them, but that's about it.

In a corporate environment - develop security policies for reacting to intrusions, come up with defense and countermeasures and have guidelines for both documentation and legal action. At home, I would decide what to do on a situational basis...

Here are some sites to look at:

http://www.antionline.com/fight-back/
(basic but a starting place)

http://htcia.org/

http://www.sans.org/newlook/home.php

http://www.labmice.net/Security/default.htm

http://www.washington.edu/People/dad/

Good luck...hope this helps!