Honestly, if someone makes this script and people use it, I don't care... but why for the love of the Great Old Ones would you mess up a perfectly simplistic forum design? The design of a single post is straightforward, simplistic, not messy, and consistent with other posts.
I visit forums that allow avatars and sigs. I invariably turn them off. Why? Because frankly, they're ugly in and of themselves. I know all the crap people can spew about expressing individuality, but this simply results in inconsistent color schemes, inconsistent image sizes, and inconsistent styles of picture, which looks like mullticolored crap even when the sigs and avatars by themselves look great. Look at the forum pic you posted again- each post is maybe half a line, but there are garish sigs and avatars (and background colors for posts, who in the name of Admiral Chiwetel Steele thought of that) which do nothing but distract from the content of the post.
At HLP at least- I can't say this for many other forums- your post is about its content, not what it looks like. To say otherwise just seems ridiculous and counterproductive. You can have it if you want, but you're seriously degrading your experience.
Oh and yes your Jesus avatar is in fact ugly, just sayin'