The sudden attacks on the libertarian Koch brothers from the Left is pretty silly and closed-minded.
And anonymous isn't part of "the Left".
In fact, almost any sentence involving a capitalized "the Left" is probably missing the mark.
They've donated at least $20 million to the ACLU to fight the Patriot Act. They support the Cato institute. One of them ran for president on the Libertarian ticket.
The Koch family isn't unified in its views; collectively the group does support some "movement conservative" causes. For that matter, they've supported a few democrats and democrat-favored causes. But "libertarian" actually fits pretty well if you need an overall label.
The people attacking the Koch brothers are from the Left--left-wing blogs, left-wing radio hosts, and so on. You don't give any reasons why my statements missed the mark, so I can only assume you have none. You may not like the phrase simply because you don't like being labeled--I'm sure the Right feels the same way.
Anonymous is just a label any anonymous people can use, and I didn't make a determination about who any anonymous people belonged to. I simply described the recent attacks on the Koch brothers, which is most definitely coming from the Left.
As for the rich creating so-called grass roots organizations I don't see Anonymous going after George Soros. So they can't be all that opposed to the practice.