You don't see either as often here as certain other sites, but two more that are invariably abused: "Most people..." and "You've obviously never..." The forme

You don't see either as often here as certain other sites, but two more that are invariably abused: "Most people..." and "You've obviously never..." The former is almost always code for "Most right-thinking people who fit into my personal worldview, which I am terrified of breaking...", while the latter is "I've got some domain knowledge here which on face value contradicts the precise words you've just written. It therefore follows that it's impossible for me to be wrong about..." and is more often than not followed by a demonstration of exactly how wrong it is possible to be. Any time I see either of these, it's end-of-thread-time.