Kathryn Houser picked this up on another Yahoo Group. Web
Beacons are new to me, but this is something that they can,
and apparently do, do.
Attached below that is a brief description of web beacons
and how they might be used, for the curious...
>>I think you'll prefer to know:
>>Yahoo is now using "Web Beacons" to track Yahoo Group
>>users around the net and see what you're doing and
>>where you are going - similar to cookies. Take a look
>>at their updated privacy statement:
>>About half-way down the page, in the section "Outside
>>the Yahoo! Network", you'll see a little "click here"
>>link that will let you "opt-out" of their new method
>>of snooping. I strongly recommend that you do this.
>>Once you have clicked that link, you are opted out.
>>Notice the "Success" message the top the next page.
>> Be careful because on that page there is a "Cancel
>>Opt-out" button that, if clicked, will *undo* the
>>opt-out. Feel free to forward this to other groups.
>>till the time,
Also called a /Web bug/ or a /pixel tag/ or a /clear GIF
>/. Used in combination with
>, a /Web beacon/ is
an often-transparent <http://www.webopedia.com/TERM/W/transparent.html
graphic image, usually no larger than 1 pixel
> x 1 pixel, that is placed
on a Web site <http://www.webopedia.com/TERM/W/Web_site.html
> or in an
> that is used to
monitor the behavior of the user
> visiting the Web site or
sending the e-mail. When the HTML
> code for the Web beacon
points to a site to retrieve the image, at the same time it can pass
along information such as the IP address
> of the computer that
retrieved the image, the time the Web beacon was viewed and for how
long, the type of browser <http://www.webopedia.com/TERM/W/browser.html
that retrieved the image and previously set cookie values. Web beacons
are typically used by a third-party to monitor the activity of a site. A
Web beacon can be detected by viewing the source code
> of a Web page and
looking for any IMG tags <http://www.webopedia.com/TERM/W/tag.html
load from a different server
> than the rest of the site.
Turning off the browser's cookies will prevent Web beacons from tracking
the user's activity. The Web beacon will still account for an anonymous
visit, but the user's unique information will not be recorded.