Teaching MBAs

This ad for an economist to teach MBAs at the Johns Hopkins University business school features the following unusual bit:

The successful candidate(s) for this position will be subject to a pre-employment background check.

To teach MBAs? What are they checking for - bad taste in wine?

Bonus question: should be happy that my former UM colleague Mario Macis passed the background check or concerned that the check was instituted only after he got hired? :)

Hat tip: Charlie Brown