Prodrag. Kama. Sorry to see you leave the forums
If you open an old post or open a new message box in the bottom of the message box is a drop menu ( Insert other media )
click to open it then select ( Insert existing attachments ) It will bring up all your photos you posted, you can delete them in there and any post with the picture on it the picture will be deleted from the site.
As far as the entire account that's a question for the tootimid staff , maybe send Rob a private message and ask him