Lamar Smith of Texas has introduced into the United States House of Representatives the following bill:
http://thomas.loc.gov/cgi-bin/query/z?c112:H.R.1981:
It is not a long bill, nor particularly hard to read. I hope that I am reading the text correctly, and I am not trying to overstate what it says.
At page 11 of the PDF, I read the bill to say that if I (as a U.S. citizen) publish a picture of a person without that person's consent, then I am guilty until proven innocent of a crime and subject to up to 20 years in prison. There are some exceptions that make publishing a person's picture not a crime, but being a street photographer or taking pictures for artistic reasons are not excluded.
If this bill passes, I think that pretty well finishes off photographing in public in the USA and then posting the picture to the internet.
When using film, a question I ask myself is, "Is this picture worth $0.50?" If this bill passes, the question becomes, "Is this picture worth 20 years?"
If I am mistaken about what the bill says, please do let me know.