I think its more of when people watch it, and only the movie, you got your butt in gear to read it before watching, that takes some effort... more or less its the people that are going to think they know everything about the watchmen because they have watched (and only watched) the movie. If people who watch it arent going to bother at least reading it and then preach how epicly leet they are in knowledge of the watchmen then yes they are the posers (and it will happen)
If the movie inspires people to read it then i dont think thats posing either, its like when you hear about something in a game of telephone, makes you wonder and ask what really was the original.
If they dont bother to ask the questions and look for themselves and then annoy the people that HAVE read it, then they are posers