Most of these folks fail to realize that they themselves wouldn't be able to write the code in the first place if there wasn't a "view source" button. Myself included -- And now you've written something you think is so awesome and innovative you need to hide it?! Douche.
By obfuscating, all you're doing is refusing to give back to the community and saying "fuck you" to the very system that trained you to begin with. You are stifling innovation in the industry, screwing over the little guy who doesn't know as much, and making yourself look like an ass, and generally speaking you should hang your head.
All of us are the modern day equivalent to shade tree mechanics. You wanna know how something works? Look under the hood. That's the beauty of the system we use. There are no secrets, and there shouldn't be.