You Deleted Your Cookies? Think Again
Found on Wired on Monday, 10 August 2009
Unlike traditional browser cookies, Flash cookies are relatively unknown to web users, and they are not controlled through the cookie privacy controls in a browser.
Several services even use the surreptitious data storage to reinstate traditional cookies that a user deleted, which is called 're-spawning' in homage to video games where zombies come back to life even after being "killed," the report found.
Easiest solution is to block the creation of flashcookies. Just remove all permissions to the directory where they are stored and voila, no more. And adding domains like "pagead2.googlesyndication.com" and "google-analytics.com" (amongst many others) to your local hosts file can actually increase the loading time of pages while it also disables being tracked by them.