Interesting point--but it's actually quite a massive leap from 'intelligence' to 'intelligent cause'--and its one for philosophy or theology, not science.
Basic epistemology (the 'how do we know what we know') is a great topic for Philosophy 101. And basic scientific methodology (which is epistemologically grounded) is an absolute staple of Science 101. So--what does ID actually bring to the table in the science classroom? Nothing of value, I'm afraid, other than an object lesson on what science does not resemble.
Concerning the epistemology - there is considerable "poaching" on either side of the divide. In that regard, I agree with betty boop that Niels Bohr had the right solution:
A parable: "when you complain about farmers, don't speak with your mouth full".