You're being amusingly snide, but just plain wrong, sorry. Blocking Google Voice at the app store quite clearly prevents iPhone users from using Google Voice, a service Google wants to provide to them. But for a third party (Apple) those users would be able to use it, so without it they are harmed.

Google doesn't want to provide/support service to WebOS, or other third party clients. These users wouldn't be served anyway, they aren't "harmed" except by reference to a utopian world where we all run free software all the time. It's like demanding that Apple support iTunes on the Linux or Palm Pre; it's a ridiculous argument.