Sounds like what might help the most would be for the people putting the panels together at SF/Fantasy cons to be more aware of 1) that teen readers in general tend to be more eclectic/open minded in their reading choices than adults are and 2) that YA Lit tends to not fit into traditional adult genres very neatly. And then, in turn, if those people were more up front about that in the naming, advertising, and panelist selection for the YA panels. Maybe that would cut down on the YA Lit 101, "back when I was a kid," and "but we've strayed from the genre!" type of detours.