I do think that it would be good to establish and maintain a set of ethics for professors who have a financial stake in companies, but it seems like this piece was more of a ranting projection built for page views than a thoughtful criticism on the state of the university.
Edit: And I should have researched a little more: Stanford does have a policy regarding faculty investments: http://doresearch.stanford.edu/policies/research-policy-hand.... Points 3 & 4 seem particularly applicably as a response:
3. Faculty must foster an atmosphere of academic freedom by
promoting the open and timely exchange of results of
scholarly activities, and ensuring that their advising of
students (defined for this policy to include postdoctoral
scholars and other trainees) and their supervision of staff
are independent of personal financial interests. Faculty
should inform students and colleagues about outside
obligations that might influence the free exchange of
scholarly information between them and the faculty member.
4. Faculty may not use University resources or personnel,
including facilities, staff, students or other trainees,
equipment, or confidential information, except in a purely
incidental way, as part of their outside consulting or
business activities or for any other purposes that are
unrelated to the education, research, scholarship, and public
service missions of the University.