I've been working on something like this recently, but I guess this guy beat me to the punch. Here's my nearly-done rainy day code:

https://github.com/Miserlou/WhitespaceBot (Python)

I'd like to add some security fixing stuff too. There's plenty that can be done here!

Bots are the secret reason why Wikipedia actually works - there's no reason why we can't have the same benefits in open source software.