[allwein]

First off, information is only logged when using Location Based Services. So if you never load up Foursquare or Google Maps, you have nothing to fear. Also, you can totally disable LBS in your settings.

Secondly, it's only maintaining a single record for each cell tower and updates the "last seen" timestamp. So while it can tell you the last time I've been to a specific area, it can't tell you how often or when I've been there previously.