Trump's New App Wants You — and Your Data

"To be sure, this doesn't mean the Trump campaign is doing anything with users' data — it just means it can. And some users may not know it: David Levine, an Elon University professor and affiliate scholar with Stanford's Center for Internet and Society, said consumers don't always read privacy policies. What's more: Less than half of all Americans knew what a privacy policy was in a late 2014 Pew survey.

Trump's request for immediate data access, without offering up more reasoning or limits, is "extremely troubling," Levine said. While not unheard of, it's controversial and "a question of ethical behavior.""