I recently joined a forum and startlingly an image of mine appeared there that I hadn't uploaded, I was baffled and so were the admins of the forum for a while.
It turned that it came from Gravatar and fair enough, I hadn't taken the time to read the smallprint and learn that Gravatar make your images available to any Gravatar enabled site you may join in the future - with or without your consent (which you may have unwittingly made when you joined the site).
*BUT* it was a previously deleted image, I had deleted it long ago !
So I deleted ALL of the images that resided in my Gravatar account and set my profile to "hidden" as Gravatar refuse to delete accounts and that's the best they can offer.
The image still appears on that forum and Gravatar (so far) have refused to answer my complaints.
Joko - *theoretically, you can delete your 'gravatars' and if you're still suspicious about the way the site runs, you can set your profile to "hidden".
*bear in mind, I had deleted one long ago but it still appeared on a Gravitar-enabled forum.
If by that you meant "how do I delete my account" ? (ie. close it totally) apparently - YOU CAN'T !
I would read the small print if it were bigger - after 40 your eyes start to go .................
I am off to bed - appointment with the nurse later to get five stitches taken out of my arm. It hurts like he11 just now so there should be an improvement after the appointment. ;-)