In the game manual definitions it states:
Alliance Platforms are denoted by their red or blue structural PVC pieces, and can only be used for Parking by Robots of the same color Alliance as the Platform.
So what is a referee to do if a robot from the opposing alliance gets on the parking platform, for example RED1 goes onto BLUE Alliance Platform with the intent of preventing either BLUE1 or BLUE2 from parking. Based on the definition this appears to be prohibited - so what would be the consequence?