The latest CFO/NCAA Off-Season Training Video on Targeting is really good. It shows examples of a wide variety of targeting fouls, in both 9-1-3 and 9-1-4 categories. And there are examples of 'suspicious' actions that are proven to be no-foul. The video quality is exceptional. Some of these examples show how difficult it is to see and verify, on the field, all of the components for targeting foul. As Shaw states, due to the potential for injury, they are supportive of throwing flags for suspicious actions that may be targeting, and letting replay make the review and final determination.
Take a look.