I'm fine with it for libraries. In fact, its use in libraries is a lot of makes ruby great! It goes too far when people start sprinkling it in business logic making it impossible to find where anything is defined. I'd say you'd either have to go full-lisp and create an entire DSL for your domain (and document it) or keep it completely out of business logic (which, as you say, the community as a whole has pretty much figured this out).