I routinely uninstall apps that do this, and give them a worst review than what they would have gotten otherwise. If they're tricking me, making it less apparent is not a plus.
People keep saying "this isn't preventing anyone from rating," but that's total nonsense. If one user can get to a rating in one click while the other has to exit your app and go hunt it down in the store, you are filtering the latter out even if your filter is not 100% effective.