I tried Disallowing the category pages with View All (?page=all) chosen from robots.txt, because Google kept warning that these pages have duplicate metadata to the Category pages. Well, of course they do - they are the same thing, just looking at all items on one long very slow loading page. I also "removed" all those View All Category pages from Google's Search. (I was successful in disallowing in robots.txt all the page=1,2,etc pages without any issues popping up.)
What did that get me???