This is about far more than running your own Ruby scripts. It's about the fact that true innovation cannot exist in such an environment. And the problem is, you will not see what you're missing; people won't bother developing new technologies that have no platform they can legally run on.
Would the Web exist if Microsoft had been able to ban Netscape from running on Windows? What new, groundbreaking technologies are we missing out on because it's not worth the time and effort to create something new if the platform vendor can simply forbid you from publishing it?