Robin Thicke -- If You Voted For Mitt Romney ... Get the Hell Away From Me

Robin Thicke has a clear message for voters today ... if you cast a ballot for Mitt Romney ... the sexy singer wants nothing to do with you.

Robin unleashed the warning in L.A. earlier today ... when our photog fired off some election related questions to Robin and Paula Patton as they strutted their hot butts down the street.

But when our camera guy made a (bad) joke about voting for Romney ... Robin hilariously responded, "Then you're not allowed to take our picture."