How can users edit what information is collected about them by SE, in particular information collected about them when they are NOT on EL&U:
If you use the Stack Overflow Network, both Stack Overflow and third parties will use cookies to track and monitor some of your activities on and off the Stack Overflow Network, and store and access some data about you, your browsing history, and your usage of the Stack Overflow Network. [Link here]
Users may be uncomfortable with SE collecting information about what they do when not on the SE metwork, or about them selling this information to third parties whose behaviour they cannot control (privacy policy or no privacy policy). I have looked at my account settings from the "Edit Profile & Settings" tab and cannot see any way to do disable this there.