Oh noes, Dave made a joke at someone else's expense! Earth is doomed!
...or life goes on as normal.
Also: People analyze these kinds of ads too much. So there's only one fat guy, and he happens to be wearing the Star Trek stuff. I'm more offended at the fact that all I see are white guys, and no other race/sex (even though the majority of people who like this stuff are, in fact, white guys).