Dean Heller actually said...

I know this issue is important to you, and obviously, it is important to all of us up here as we are asking these questions.

People don't know. People just don't know. And I think if they knew, they might care.

Are there online advertising companies that do collect and use such information about their users?

Clearly, industry is understanding, boy, it is time to get this information out there because more people are becoming concerned.