Really? I've been to two book signings (Tom Clancy near the Sub Base in Ct- a total madhouse; and Don and Fred Imus at Mohegan Sun Casino)and both times the authors were writing so frantically that I felt like I was intruding to offer a personal comment.
We did take a couple of pictures of Tom Clancy- and then promptly lost the film :(
Seems to me shaking hands in a receiving line is much more personal. Odd that Hillary! would do that.