WIKI
Why does your cookie keep coming back after I delete it?
When you visit any website or search engine on which DoubleClick’s DART technology is used, our servers will check to see if you already have a DART cookie. If the servers do not receive a DART cookie, the servers will try to set a cookie in response to your browser’s “request” to view that Web page. If you do not want a DART cookie with a unique value, you can obtain a DoubleClick DART “opt out” cookie. Alternatively, you can adjust your Internet browser’s settings for handling cookies. This is explained in the next question.
Why does your cookie keep coming back after I delete it?
When you visit any website or search engine on which DoubleClick’s DART technology is used, our servers will check to see if you already have a DART cookie. If the servers do not receive a DART cookie, the servers will try to set a cookie in response to your browser’s “request” to view that Web page. If you do not want a DART cookie with a unique value, you can obtain a DoubleClick DART “opt out” cookie. Alternatively, you can adjust your Internet browser’s settings for handling cookies. This is explained in the next question.