Content posted to Stack Exchange websites is under the Creative Commons license. Specifically, code posted to Stack Overflow and Code Golf are available for use, ..... and abuse!
I suggest we take on the challenge of finding the worst code out there on our sister sites, and making it the best!
If a challenge on Code Golf is interesting, and you think you could do it properly, then do it, and post it for review.
If you find some interesting, but really, really broken code on Stack Overflow, then fix it, and post it for review.
Cleaning up the worst of SE, I suggest the tag: polishing-turdsrags-to-riches for any such improvements!