From his blog (Emphasis mine):
Michael Roth, What are you doing about global warming? These were the words I saw graffitied on the sidewalk near my office this week. There were a few more global warming tags at the Usdan Center and walkways. What an important subject, but what a dumb way to articulate it! We asked physical plant workers to clear the surfaces, using even more energy resources than we already were doing. And how was I supposed to respond – with graffiti? I don’t think that would be very effective.
Obviously the answer is to CHALK THE SHIT OUT OF SOUTH COLLEGE. From Anon:
Allow me to summarize his blog post:
“If you chalk near my office, you will get my attention, and I will respond to you.”
Not that you should. Just sayin’.