<Snipped quote by GalaxyRaider>
Do you think it’s still dangerous, even though it hasn’t been very long?
I think the time frame doesn't matter so much. The Big X operates by a buddy system of sorts, so even when no one knows where he is, you should always be able to count on Vex to know. Even if he can't tell you where he is and what he's doing, he could at least verify that he did know. But he doesn't. Neither do any of the others for the other Big X members.