Well, I am a person who runs spybot and adware weekly to delete cookies. Yes, they are mostly harmless, but I find them annoying, personal preference.
I did find some pretty malicous stuff on DD8's computer even though we have virus protection. Keystroke recording device, etc.
I did delete all stored PM's with personal info. There's really no reason to keep old messages up anyway, except for laziness on my part.

smile