We are but there isn't anything we can do about that. We can turn the /img code off so that in order for a member to post a pic they have to upload it but we can't force a member to copy images from a link and then post them here.
A perfect example would be something like this: A member has a question about an item on ebay, so they post the link and a through discussion of said item occurs, where everyone learns something.
Then, 30 or 60 days after the auction ends, ebay pulls the auction down (as is their policy) and now the thread here is utterly useless.
What the member should have done is copy all the data and images from the ebay auction and post them here. But like I said, there is no way for us to automate this.