Here is the list of beacons that follow us. You can opt out at

http://www.networkadvertising.org/choices/#main-menu

AOL Advertising
Atlas Solutions, LLC..
Legolas Media, Inc.
Microsoft Advertising
24/7 Media
33Across
Accuen Inc
Adap.tv, Inc.
Adara Media, Inc.
Adblade
AddThis (including XGraph)
Admeld Inc.
AdRoll
AppNexus, Inc.
AudienceScience, Inc.
Batanga Network
Bazaarvoice, Inc.
Bizo
BlueKai Inc.
Break Media
Brightroll, Inc.
Brilig, a division of Merkle
Buysight, Inc.
Casale Media
Chango, Inc.
Channel Intelligence, Inc.
ChoiceStream, Inc.
Cognitive Match, Inc.
Collective Media, Inc.
CoreAudience (formerly RedAril)
Cox Digital Solutions
Criteo
Cross Pixel, Inc.
DataLogix, Inc.
DataXu Inc.
Datonics (formerly AlmondNet Data Division)
Dotomi
Dstillery (formerly Media6Degrees)
eXelate
eyeReturn Marketing
FetchBack Inc
Flashtalking
Glam Media, Inc.
Google Inc.
I-Behavior, Inc.
IDG TechNetwork
IgnitionOne Inc.
Intent Media
Invite Media
Kontera
Krux Digital, Inc.
LiveRail Inc.
LiveRamp
Lotame Solutions, Inc.
MAGNETIC
Markit On Demand
MaxPoint Interactive, Inc.
Media Innovation Group (MIG)
Media.Net
MediaForge
MediaMath, Inc.
MediaMind Technologies (including EyeWonder)
Mediaplex
Mixpo
MLN Advertising Inc
Netmining LLC
NetSeer, Inc.
OwnerIQ
PointRoll
Proclivity Media, Inc.
PubMatic
Pulsepoint
RadiumOne
RichRelevance, Inc.
Rocket Fuel Inc.
ShareThis
Specific Media LLC
SteelHouse
TARGUSinfo
TellApart, Inc.
the Rubicon Project, Inc.
Tribal Fusion
Triggit, Inc.
TruEffect, Inc.
TubeMogul, Inc.
Tumri, Inc.
Turn, Inc.
Undertone
ValueClick Media
Vibrant Media, Inc.
Videology
Yahoo! (now including Genome)
YuMe, Inc.
ZEDO Inc.

I bought a snapshot camera at Staples two years ago and eBay just showed me a list of dozens of them as recommended for me. It's just really obnoxious. And stupid. If I bought a snapshot camera at Staples, then I already have one!