Of course not, but I don't think it always hurts to superimpose an "objective" moral line in the sand.
That's still not "objective." Not that it matters. For example, nearly the entire human race agrees with my stance that cannibalism is morally wrong. The collective "subjective" moral sanction of a near-universal consensus may not be the same as an objective consensus in theory, but it means the same thing in practice. Societal morals are basically the (super?)majority societal consensus and can drift as individuals' moral tastes drift. There's nothing wrong with society deciding "these are the rules we are going to live by" and then upholding them as long as the door's open for the next generation to go "these worked, these didn't, let's change it up."