Also, let's be clear here on who bears the brunt of these actions - when a lab is short on funding, it's the grad students who lose out first. Vijay tweeted as much, saying he'd rather his grad students need to TA an extra semester or two rather than take Google's money.
That's a really odd comment. Sure it would be nice if he could come up with such a plan, but it's a non sequitur to couple that to a decision to decline a grant. It's like saying, "Joe bought an electric car because he's concerned about global warming, but it would have been useful if he solved the worldwide problem, too...and developed a warp drive."
Also, you can't make people more ethical with a course. It doesn't work like that. People either have a semblance of a moral compass or they don't, and unfortunately I think there is less and less big-picture moral courage and critical thinking amongst the majority of knowledge workers. Maybe it's the way people were raised in the past 30 years, e.g., latchkey kids who grew up feral without mentors or active parental involvement due to two full-time working parents.