For anyone not getting what this comment means by "The biggest F." this article on wiki explains it as:
> "Press F to pay respects" or "Press X to pay respects" is an Internet meme that originated from Call of Duty: Advanced Warfare, a 2014 first-person shooter in Activision's Call of Duty franchise. It originated as a set of instructions conveyed during an in-game quick time event at a funeral service. Widely mocked by critics and players due to its forced element of interactivity that was not perceived to be tastefully executed, the phrase would later become a notable Internet meme in its own right. It is sometimes used by Internet commenters to convey solidarity and sympathy, either sarcastic or sincere, in response to unfortunate events
So much positive impact on the world.