This is going to be a revised posting because of the new forum software, XenForo, that Mr. Wizard has implemented into SRK. When you first click on reply, you will see the picture of the quote in the reply box. In the upper-right hand corner of the reply box, you will need to select "Use BBcode editor" (The symbol looks like a couple of 'A's). Selecting that option will allow a user to delete the IMG tags and just leave the intended source link. This will be the only warning. Infractions/warnings are still in place.
Image quoting not being allowed is FORUM-wide, not just limited to IMM, anymore, so be careful out there, folks.