Based on the above, I really don't believe this
story. After all, why would he impersonate someone he hates? One would think he dressed up as The Donald...
I can "sorta" believe it, but only in this regard...he did it (or at least his old dorm mate said he did) because he thought this might come off "cool." While it's been sighted that he had quite a few friends, most of the ones who have come forward to reminisce, seem rather luke warm with their fond memories. I wouldn't say strained, but they seemed detached from anything that was deeper than surface friendship...being civil and congenial.
It's easy to picture Romney doing something stupid like that, to snag a few kudos points. I don't think he was lonely, per se, but if his current demeanor and the way he projects him self has even half an ounce of left overs from his youth and young adulthood...it wouldn't be difficult to imagine him thinking something like that would "bad ass."
Do I think he did? Nah. But, like I said, I can picture a young Romney doing stupid shit like that.