Could it be possible to detect the Kordylewski Clouds if they passed in front of a distant star?

I've always heard them referred to as hypothetical, and no sighting claims have ever been confirmed. Would it be possible to detect them if they passed in front of a star, would we be able to measure the minute change in brightness to determine if they are really there?

All criticisms welcome.

For those of you unfamiliar with the Kordylewski Clouds:

http://en.wikipedia.org/wiki/Kordylewski_cloud

This is a follow up question to the one I asked yesterday, which I would still appreciate replies to.