Watch what you blog about, watch your language in the comments, don't forget to mention your full name, sex, race and drivers license number in case someone finds your post annoying or abusive, because now you're legally responsible for every word you type and don't even think to do it anonymously. According to the Violence Against Women and Department of Justice Reauthorization Act of 2005 which was signed into law you can be put in jail up to two years:

According to a section of the act, anyone who uses the Internet anonymously "with intent to annoy, abuse, threaten, or harass another person" can be tried for violating federal telecommunications law and face fines or jail.

More information at Annoying Online Posts Could Be Illegal.