It might be worth contacting members of Cisco's board of directors to inquire whether they plan to do something to avoid this kind of illicit behavior in the future. A board of directors doesn't manage day-to-day affairs, but is ultimately responsible for high-level oversight. The Cisco board of directors includes a number of people with generally solid reputations (including the president of Stanford University) who ought to be shocked if a company under their watch has engaged in this sort of behavior.

Here is a list, though you'll have to search elsewhere for contact information: http://investor.cisco.com/directors.cfm

Alternatively/additionally, many of us have occasion to do business with Cisco now and then, and if you currently do, you might mention a concern to your local Cisco office/representative.