Ugh. I think I made it pretty clear that I wasn't claiming everyone who would turn down his request would do so because they found it weird, just that some would. Though on two--a lot of individuals may find it an inappropriate request as well. Why? Because many individuals are taught not to do things like get in a car and drive thousands of miles with a stranger--and may feel slightly weirded out that others were not taught that lesson and may wonder at the motivations.
I was simply says that it wasn't out of the realm of possibility that some people would find it inappropriate to take the trip personally (and may also find it a weird/inappropriate request)--and I think there are some sound reasons for that feeling. I wouldn't have that reaction (I'd just tell the guy good luck and I'd meet him in CA), but I wouldn't really hold it against someone who did. I feel like I may be speaking from a stereotypical female perspective, but there you have it.
Of course, many won't find it weird at alllll, though! And regardless, once everyone is in school together, they will all get to know one another and realize the request wasn't meant to be weird at all--just adventurous.