I really just can't get over how stupid the first movie is. The story makes no sense. Okay, the villains steal the first piece of the Spear of Destiny from the Library, and the other two pieces are securely locked away in locations that nobody knows about. So really, Flynn's assignment should be to get the first piece back, because the other two aren't in any real danger. Instead, he goes on a quest to find the second one and bring it
out of its secure location, which lets the bad guys get it and then force him to find the third piece. And then at the end, after they've reassembled the deadliest weapon in the world, they put it back in the Library the first piece was stolen from -- i.e. the place that had by far the
least security of any of the three hiding places.
Not to mention, if they needed that handy-dandy book to find out where the other two pieces were, why didn't the Serpent Brotherhood
steal the book along with the first piece? The whole quest made no sense.
The second film wasn't much better in this regard. Once again, the plan for keeping a powerful artifact out of evil hands is for Flynn to find it himself and lead the villains right to it. I mean, once he'd gotten the map out of the bad guys' hands, the sensible thing to do would've been to take it back to the Library and leave it at that. He had no actual reason at that point to continue searching for the tomb, except maybe to impress the archaeologist love interest.
So in both movies, the world would've been in less danger if the "hero" had just left well enough alone. (Okay,
the same goes for Raiders of the Lost Ark, but at least that movie has other stuff going for it.)