I was merely trying to point out that contrary to what the OP seemed to be suggesting, this file is not a list of patents that Facebook says apply to this code, or anything else particularly nefarious.

Also, your paraphrasing leaves out the crucial bit that you only lose your rights if you sue Facebook for patent infringment. If, say, you decide to sue Facebook because you're sick of seeing the stupid Buzzfeed articles your so-called friends keep liking in your news feed, you can continue using their software.