Actually, you're trusting Google that that's how the ad generation is done, that no human eye, no Gmail Man eye, ever lays on anyone's email. I don't trust Google that much.
Shrug. There are far more things to be paranoid about online than gmail. Common sense should tell you not to send trade secrets or confidential information over gmail if you're really concerned about 3rd-party eyeballing. And it's not like any other free webmail service is any better.
