You may be a sex offender if. . .

1. You pee in public

Juan Matamoros was arrested for public urination in Massachusetts in 1986. And that branded him a sex offender to this day in Florida, which lists his crime as “Sex Offense, Other State (Open and Gross Lewd & Lascivious Behavior—2 Counts).”

In 2007, Matamoros had to move his family because he was not allowed to live within 2,500 feet of a city park, and his registry entry now lists him as “transient.”

In 2005, a construction worker, who just so happened to be a Mexican immigrant, was caught by a police officer peeing behind a garbage can in an alley. He was arrested and convicted of public urination within 100 yards of a Chicago school, and was eventually deported from the U.S. as part of Homeland Security’s “Operation Predator.”

3. You have a laptop and it's connected to the Internet and there are children nearby

In 2004, Julie Amero—a 37-year-old substitute teacher in Norwich, Connecticut—was teaching a seventh grade language class when her laptop computer, which was visible to students, began displaying pop-up ads for pornographic websites.

“The pop-ups never went away,” she said, according to a court transcript. “It was one after another. They were continuous. Every time I clicked the box in the corner, the red box, the red X, more were generated.”

When parents learned of the unexpected sex lesson, charges were filed against Amero—a total of 10 counts of “risk of injury to a minor, or impairing the morals of a child.”

Facing 40 years behind bars and a required sex offender registration, the teacher pleaded guilty to a misdemeanor charge and surrendered her state teaching credentials.

“Everybody out there should be afraid,” she said during an interview in 2009 with Good Morning America. “If it can happen to me, it can certainly happen to you.”