A while back I decided to check out this thing called Python that everyone was praising. Thought it was kinda neat at first... until I found out it had FIOC, at which point I uninstalled everything related to it.
Most stupid idea since... well, I really can't think of anything worse ever being introduced in a language before. 99% of the time it achieves absolutely nothing because people indent properly anyway for readability. And the rest of the time there's usually a good reason breaking convention.
Not to mention the joy of trying to track down a runtime bug caused by a missing/extra tab in a large project. Whee.