School choice advocates have requested the names, addresses, phone numbers and grade levels of every student enrolled in 30 different public school districts, gearing up for a marketing campaign should lawmakers lift the enrollment cap on Wisconsin's statewide voucher program.

But what School Choice Wisconsin sees as a legal way to augment its mailing list, public school supporters see as a legal affront on personal privacy. The issue is prompting some district leaders to revisit options for limiting the release of student data, including reminding parents of their ability to opt out.

"While the district must comply with the request required by law, I find it difficult to believe that this was the intended purpose of the (open records) law," Green Bay Area School District Superintendent Michelle Langenfeld wrote in a letter to parents this week, informing them of the data request.

School Choice Wisconsin, which lobbies for public money to support the education of children in private schools, made requests under the state's open records laws recently to obtain student directory information from Green Bay, Oshkosh, Sheboygan, Manitowoc, Wausau and at least two dozen other districts.