Juxtaposition

Gmail has feature where it selects ads for the sidebar based on the content of your e-mails. I got one e-mail where my mom mentioned my aunt's phone number, resulting in the following ads:

Fool Caller ID
Be Anyone, Anywhere, Anytime Display any number on caller id
www.spoofcom.com

Stop / ID Harassing Calls
Unblock ALL Calls (even if blocked) Cell, Unlisted & Private Numbers
www.IDHarassingCalls.com

Trace Phone Number
Get unlisted phone numbers, find anyone in the USA! Search for free.
www.usa-people-search.com

Ah, the joy of arms races.