All the information on this site was submitted by the persons themselves, thus it is by each person's consent. However, you should have complete control over any of your personal information. Therefore:To edit your listing, submit the registration form again, leaving out the stuff you wish to keep to yourself. A new form submission will overwrite the old info.
To delete your listing entirely, submit the registration form again, and select the "delete my listing" option.
Please note it may take a couple of days for changes to take effect.