Computer Fraud and Abuse Act (CFAA, 1986)
http://www.usdoj.gov/criminal/cybercrime/1030_new.html
Or lots of links here to peruse.
http://www.google.com/search?q=Computer+Fraud+and+Abuse+Act+(CFAA%2C+1986)&sourceid=navclient-ff&ie=UTF-8&rlz=1B3GGGL_enUS177US231
Sorry, it's too late for me to fool around making the links into click-links.
You should find what you need in some of these. Doesn't look like the penalties are that severe unless they catch you under the Homeland Security stuff in which case you can kiss your ass goodbye and say hello to Gitmo.
