Actually, ID "theory"
is religious. It was invented by the religious, and uses scientific sounding terms to fool the religious. When the ID proponent says "intelligent designer" he or she means the Christian God, no matter what else they may state. It is meant to be a scientific sounding way to get the Christian version of the Creation story into schools because they don't like people learning evolution. There is no science behind it. By the very nature of the "theory" it cannot be proven. You cannot prove the existence of an "intelligent designer". ID proponents have no clearcut definition of how to notice "design" and they have no experimentation to detect it.
Here is an article for the "ID-is-not-religion" crowd.
Another for the "ID-is-science" crowd. And
another for the "ID-is-not-creationism" crowd. Heck,
here's an entire page that offers a rebuttal for just about any Creationist or ID claim you can think of. At least be honest enough to label it for what it is.