Sue,
This is a privately owned site, the owner can tell who ever they want not to post things or even ban them for posting something they don't agree with.
No matter what the person's purpose is, to shake the tree or to actually write something they believe in really does not matter. What matters is that it is sort of civil, not with name calling or some other form or perceived insults because of differing opinions.
EO does a good job here, some of it I don't agree with but I can voice my opinion and not get banned for it, which is a great thing.
As for the original post, I find it rather sad because the American dream is dying on the vine and Obama is one in a series of people who are killing it by trying to make a tomato into a bean - so to speak.