We use the CityGrid API for pulling extra information that our data might be missing, like hours, descriptions, and links. The visiting user's IP is sent with the request per CityGrid's requirements. We believe the trade off for being able to use their additive information is worth it.
We have Facebook login integration for ease of use, but have no desire to see your friends list, contact information, or to post on your wall without your permission. The feature is only included to give an easier way to login and register for the site.
Google Analytics is used for visitor analytics.
Google Adsense is used for advertising.
If you don't agree with any of the above information, don't use the site.
Also, that tin foil hat looks great on you...