You know, no one took away the check boxes that let you choose which Windows Live programs you want to install when you're trying to run the installer. The installer doesn't even download any of those apps if you leave them unchecked. If you don't want Messenger, Photo Gallery, or even to sign up for a Windows Live ID, you don't have to get/do those things.
Most people find that this is actually helpful, though, because signing up for (or using, since the vast majority of folks already have one) a Live ID enables a bunch of convenient features like easily uploading your photos and videos (either to Microsoft's services or to Flickr, YouTube, Facebook, etc.) And most users who use Movie Maker also want to, for instance, organize their photos. Let's not forget that iLife also comes as a suite for a reason.
On the other hand, signing up for a new throwaway account just to trash Microsoft... yeah, that's classy.
(Usual disclosure: I work at Microsoft.)