Gino,
you can delete attachments in the user cp which will edit the post. I delete every so often for space here and privacy issues if any.
If you go to the user cp under the users login ( on the left of this page toward the top) and click on attachments, you can see how many images on the site you have and how much space you are using. Photos and attachments take up disk space on servers and i don't know if Fred has a cap on people here or what, but i like to keep my usage down to the minimum.