For me, after studying the arguments from both sides for some time now, I am not sure one way or the other about the scientific validity of ID. Right now I tend to think that it is an inference that is drawing metaphysical conclusions from physical data. Which would make it philosophy as I implied earlier. Yes it is certainly possible that aliens could be the intelligent designer but even a 5th grader will ask the obvious question as to who designed the aliens? Or did they evolve naturaly? So in the end, to avoid an infinite regress, some kind of god-like entity will have to be discussed as an option for the designer. What this means to me is that the inference which says that an intelligence had an influence on some aspects of the natural world is a philosophical inference and not a scientific one.
But how about this, one of the main thrusts of the ID movement is the claim that chance and necessity are noe sufficient causal forces and that some other force of some kind is required for certain aspects of the universe to be as they are. Now up to this point it seems to me that this is purely a scientific pursuit. A question is asked, are chance and necesity sufficient causal forces? Research is done and biological structures such as the bacteria flagellum are studied. An hypothesis is raised that evolution by chance and necesity alone is an insufficient explanation, the hypothesis is criticized by other scientists who say that evolution by chance and necesity are sufficient explanations. Now doing experiments in this field are difficult if not impossible because the we are talking about events that happened in the past, causal forces in the past that lead to current structures. But this all seems very scientific to me. BUT when someone makes the further inference that if chance and neccessity are insufficient then intelligence must be involved, I think we have moved out of science and into philosophy.
So can it be possible to disscus in a secondary school science classroom the strengths and weaknesses of chance and neccesity as possible causal forces in nature without raising the possible alternitive force of intelligence as another possible causal force?