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Yes, that works in some cases. I have heart

Thanks

In Webmaster Tools, go to URL Parameters under Site Settings.  You will probably see some of the parameters you want to block in the list.  Click on Edit next to a parameter you want to block like "?app=members" and then choose the appropriate settings to prevent Googlebot crawling. I don't know if that is the preferred way of doing it, but that should block those dynamic pages.

I wish there was a nicer solution to that, but that's the least painful way.