One of the problems with ID and creationism is that they are ideas which arise expressly from a belief in a transcendent entity.
Yes - that's a problem, as one can never infer that God is the cause of a thing it seems, as God will always be invoked posteriori. Therefore nobody can ever predict that an intelligence is at work without people thinking that the person is claiming that God did it.
But if there is a genuine cause to consider an intelligent agent of some sort, then the person's beliefs should not matter. A Theist can also not have an ulterior motive.
I, for example, consider myself a Theist, but I don't see that this intelligence necessarily has anything to do with God - as there could be a natural explanation, which there usually is.