I'd head things about how easy digital facial recognition is to be foiled, so the most striking thing about this part was that Admire mentioned Robin, and the researcher's name is Adam Harvey, as in Adam West + Harvey Dent. (And I'm not even that much of a geek - I actually had to look up Harvey Dent's name. I searched Wikipedia for 'list of batman villains'.)
I agree the test for the leader may have been faulty. If you're physically following a leader, he should try to be at the forefront of the group, hence the edge. If you're not physically moving, things might be different. Experiment suggestion: a group of people must reach an unanimous conclusion about something or other. Two 'plants' are giving opposite suggestions, one standing at the center of the group, one hanging at the edge. Who wins?
That pill thing sounded scary, but if it only tells you it was taken and nothing else it's fine. Then again, the guy could feed it to his dog and it'd go off. Or child. Or hostage. (SAW XIII: SCREW THE DOCTORS)
Frogs are weird.