The ND-FSU game is the textbook example of offensive pass interference. The receiver didn't even try to run a route, but just ran up and put both hands into the defender's chest.
A textbook example of a rub route is what we ran to score the winning TD against LSU two years ago [sorry, no video]. two shallow crossing routes close enough that one WR forced the DB covering another to separate from coverage, but without any contact. Danielson even called attention to it in his replay analysis.
The Clemson example is more of a grey area. Renfrow clearly initiated contact and could have been called, but since it was more of a hip check, the officials couldn't really see it.
