Feature request: adding parents through MD5 hashes

I use the Danbooru image search to make sure that the images I post on Danbooru aren't already there. However, this poses a problem for me when I find that I'm uploading a picture that's part of a series or related to an image currently on Danbooru. The image search links to images by their hash numbers, but parents are added through post numbers.

Here's an example: I just uploaded this image: post #228130
That Tifa image is related to this image: http://danbooru.donmai.us/post/show?md5=911e218a8088a3cb7179fd2645928af8
It would be very convienent if I could make the latter image a parent to the former simply entering in the Parent field "md5=911e218a8088a3cb7179fd2645928af8".

The post ID can be found in the left corner under "Statistics", in your case the number is "129517".