If you have Verizon cell phone service opt-out of location marketing here. Note you will need to log in to your Verizon account, and then — get this — you’ll have to save your preferences three times, once for each of the three sections. Because saving just once would be too easy.
The three sections are: Customer Proprietary Network Information Settings, Business & Marketing Reports, and Relevant Mobile Advertising.
Found via Verizon Plans to Start Tracking Your Mobile Information – Instead of Freaking Out, Simply Opt-Out of It – Droid Life: A Droid Community Blog.