I think this is being overhashed somewhat. Apparently 1200 people showed up, which was far too much for the other venue they'd chosen. Ford Field was the only other indoor place that could fit them all. And it's not fair to compare this to the DNC 2008. That was a party-wide, national event arranged months in advance that took place in the summer. This is a local rally in the middle of winter in Michigan.
Which goes to show you how incompetent his team is.
I mean this is politics 101, it is better to turn people away because you are sold out then to fit everyone in and have empty space, it just is bad optics. Romney already has a perception as being someone no one really gives a damn about, why throw Obama and the Democrats a slow pitch?