Not quite the same, but....
http://www.statesman.com/news/conten...812photos.html
Man charged with taking illegal photos of topless women
Houston man arrested after deputy spots him lurking at Lake Travis.
Here are two snippets from the story:
Under state law, "improper photography" is defined as taking a photograph of someone or visually recording them without the person's consent and with the intent to arouse or gratify the sexual desire of any person.
James Hemphill, a First Amendment lawyer in Austin whose clients include the American-Statesman, said that under a broad interpretation of privacy laws, a person implicitly gives consent to be photographed by being in a public place.
While I support the First Amendment, the article doesn't make it sound like any model release was obtained.