Concerning confronting plagiarism

from the post, Confronting Plagiarism by Tracy Mitrano :

Let’s stop the cover up of plagiarism. Much of it occurs, I am learning, in freshman and sophomore introductory courses filled with large numbers of students, taught by junior faculty under tremendous pressure not to make waves while under scrutiny for tenure. Let’s face it: it is an embarrassment for a college or university, although I submit that the failure to address it straightforwardly will cause the more enduring harm.

Perhaps one should also worry about faculty plagiarism. When SIU has a president who plagiarized parts of his Ph.D. thesis, it's tough to focus on the freshmen. Which is the bigger embarrassment? Which is easier to detect?