Rick Olson gives us a peek into a rather interesting system that he developed a while back Here's a snippet from the web.config file. And yes, that is custom parameter handling that you see ...

... thankfully, Rick had the sense to abandon the architecture, move on, and never, ever look back again. But let's be nice, he did admit to it, after all. And if that doesn't earn you redemption, I don't know what will (aside from going back and fixing it).