Oh come off it man. Obviously not all fanboys are of the same body build, visual capacity or racial background for that matter.
Nothing pisses me off more than people who take offense to an obvious joke designed to emphasize point rather than offend.
Moreover, responses such as yours to said joke scream "I can't think of a good comeback so I'm going to be indignant about the most rediculous thing I can come up with"
EDIT: Final thought on the matter is if you can't look at at pic like
and laugh, then you shouldn't be browsing ANY net forums because trust me bro, there is a lot MORE offensive **** out there than this