A federal judge in San Jose, Calif., will decide Friday whether Gmail users are victims of invasion of privacy.
But some note the information is buried in the fine print.
"At least they should make it clear," Ben Dai, a college junior, said. "At least they should make it clear, absolutely clear, like bold fine print, underlined, italicized that they're going through my mail."
Consumer watchdog Jamie Court said, "This is all about Google's business model of gathering as much data as it can about our appetites, our hungers, our desires so it can target us with marketing."
The case could be pivotal for future Google services.