Absolutely! In fact, I've made that very point on an ID thread just a few weeks ago. Naturalism is itself a faith.
I'd go about halfway with that ... absolute naturalism is a matter of faith, just as absolute creationism is.
But here in the real world, we've got a more complex reality where we know that some things occur naturally; and we know that it's possible for things to be designed for specific purposes -- including, increasingly, biological entities.
I recall once reading something by Einstein, about his thought processes in coming up with Special Relativity. His first step was to investigate the assumptions under which science was currently operating.
It seems to me that the assumption of "random processes only" is open to investigation -- certainly evolutionary biology treats it as a given. But it is up to those who do not consider it a "given" to establish sufficient grounds to revise the assumption.