This is a very old example from 2009:
http://www.zdnet.de/41001742/amazon-...er-kindle-vor/
Sorry, the article is in German, but it says that Amazon took legal pressure against MobileRead because the forum had a link to a tool to remove drm. It may be an old example, it may be a small example, but it shows that some companies will take action against anything drm-removal and I'm afraid there have been more actions like this "behind the scene".
So, perhaps the "double standard" is the best possible compromise.