Holy cow, I wrote a book!
(or as they call them "web beacons") - these are the little 1x1
images that web sites use to keep track of where you're going.
Halfway down the page (at least as of the time I wrote this,
which is not the same as the time this gets posted since I write
stuff in advance...) in the section "Outside the Yahoo! Network"
there is a link to opt out of sharing the information with companies
outside the Yahoo! Network.
Maybe it's time to start surfing with images off again, or perhaps
somebody can write a plug-in that blocks all 1x1 images.
[Raymond is currently on vacation; this message was pre-recorded.]