I would agree, however the numerous "hindsight" experiments including the evolution of moths in the UK throughout the industrial age to the present demonstrates an attempt of experimentaion.

Exactly what kind of experiment, hindsight or otherwise, can one conduct to prove intelligent design? Prayer? Concentrated opinion?

I think it was designed to be guaranteed unprovable.
Indeed some people have claimed the same for string theory.

http://www.angelfire.com/md2/customviolins/intelpidity.jpg

Creationists might seek to outnumber evolutionists on the school board but that does not make them correct.

Science is not a democracy of rule by majority.