My friend was telling me this one. She and her husband had seen The Hobbit on a date night. I'd seen it twice already so we started talking about it.
She said her brother had seen it too. He told her all about it in a rant about how they had just "ripped off LOTR" and how it was the "exact same story" and "how could they get away with blatant copyright." Apparently the fact that some of the same actors were in it and all the hinting toward the events of LOTR wasn't enough to clue him. She gently explained to him that the books had the same author and that The Hobbit was something of a prequel to LOTR. "Ohhhhh...." 
I remember coming out of Fellowship of the Ring and hearing a girl behind me ranting about the "lousy ending". When her companion explained it was a trilogy, she snorted, "So, they're trying to rip off Star Wars, are they?"
I heard someone rant after Return of the King that they just "copied the spider from Harry Potter. LAME!"
After I watched "The Hobbit" I really wasn't sure where they ripped it off from. Certainly not the book... 
Are you saying the spider wasn't in there in the Hobbit/Lord of the Rings? It's been decades since I read them, but I'm pretty sure Shelob WAS in there.... Am I nuts, or confused?
Well, Mirkwood had spiders in it in the Hobbit book, and then yeah, there's Shelob in LOTR. There are definitely spiders in Tolkien.
It was a joke...
I assumed so too, I guess the "joke" part is meant to be something along the lines of
"I thought the Hobbit movie was so bad that it wasn't even based on anything Tolkein wrote". Right? However, I can see why people might assume it was a serious part of the dialogue and not get the underlying sarcasm of the poster. I picked up on that one just because I happen to be a big Tolkein fan and I have acquaintances who like to make similar disparaging remarks about the film adaptations (because converting a book into film medium is *so* easy of course

).
For the record, I want to note that I was kind of "taken in" by the buffalo wings story. To be fair, I wasn't exactly over-thinking it or paying attention to the details, because it's not a topic I have any particular concern about. I basically thought they were saying that there was originally a dish made of some form of buffalo that was referred to as "wings", and somebody then created a chicken wing dish based on that. (So a relatively plausible story). I had no idea, and have none still, what the roosevelt reference meant so it in no way indicated to me that the story was implausible. Of course by the time I read the post the edit had been made indicating it was a joke, so I got to the end and went "Oh ok, it's an urban legend" and moved on.
For the record, I'm not typically a gullible person. I'm a regular on Snopes, I don't "like" or "share" any of those absurd FB posts and I don't send on forward emails (unless I can verify their accuracy, which so far as never happened!). I'm also a degree educated and fairly intelligent person, and come from a family who joke around a lot. Anyway I just wanted to put it out there that sometimes jokes aren't as obvious as they might seem.

In the context of this thread I wouldn't be expecting somebody to deliberately provide misinformation, so although I don't believe everything I read on the internet nor would I automatically assume that a poster was pulling my leg. So I do think being clear when joking is worthwhile in this context. Sorry if this hurts anybody's brains!