Skip "Sign in to Google" when setting up new Android device
My Shield TV worked just fine for three years without a Google account, but the Oreo update appeared to lock me into a signup page; This is pretty obnoxious.

You can double-tap the home button and dismiss all the active applications; once you do that the launcher will come up without requiring you to login to a Google account or give them your phone number to create one.

You will have a permanent notification suggesting you sign in, though.