While I share your sentiment, the case with MS was different because they were coercing hardware manufacturers into not bundling Netscape by threatening to revoke their Windows licence. Google aren't revoking access to their other, primary product if you use Yelp, Bing Maps etc.
They gave Yelp two options: either disable crawling in robots.txt, which means that Yelp won't show up in Google's results at all, or accept that Google will copy Yelp reviews without linking back. This is quite similar to what Microsoft was doing in my opinion.
