Star Trek and Cross-Species Fornication

Kevin Swanson decided not to take his children to see the latest Star Trek movie, with the cross-species mating and all. Where should families draw the line for these sorts of things? Discovery Channel is pursing a superheroes program featuring cross-gendered kids, and American parents are trying to find ways to keep their kids off of drugs. We suggest that the 5th Commandment may play in here somewhere.