First things first:
Second things second:
I've seen lots of threads about Anonymous Operations such as #OpFacebook. There are many, many fake videos sent out claiming to be from Anonymous, starting fake operations. Here are some actual websites to get information about operations that are actually going on. and of course, the big Operations would not be discussed publicly as it would have given Facebook weeks of Advanced notice to set up security counter-measures against any sort of attack.
Anonymous Communications