You could tell the good guys from the bad based on the condition their teeth was in. Simon the Cyrene, if I remember right, had an overhang, but the way Gibson lingered over his face you can tell his teeth'll straighten out miraculously, later that night.
As for caricatures--hoo boy, I saw plenty. There was a lot of hooting and hawing, and I swear one of them looked like Alf his nose was so damned ugly. Barabbas practically chewed on the temple columns. There was a sniggering contest among the Roman torturers (incidentally, not many of them would be Romans at all--they'd be Greeks, Syrians, conscripts from all places. And they'd speak Greek, the only common language they have).