In just about six weeks I'll be giving my talk at RubyConf 2006 called "More than enough rope to hang yourself". The talk will address the pitfalls of overzealous use of some of the more powerful feature in Ruby, such as metaprogramming, method chaining and method_missing hacks. Often these techniques are quite useful, but when overused they can really make your life miserable. Or more often, they mess up some poor sucker who has to deal with the code someone else wrote.
I'm working on writing the presentation itself now. I've got some good examples of excessively clever code, but could always use more. So here's your chance to help contribute to a RubyConf presentation. If you have a good example of Ruby code that is overly clever and makes you want to pull your hair out, I'd love to see it. Email me code examples at (josh (at) hasmanythrough (dot) com).