Nir Rosen, whose insensitive tweets about the sexual assault on Lara Logan in Cairo outraged everybody, has resigned as a fellow at the NYU Center on Law and Security:

Official CLS Statement on Nir Rosen
From Karen J. Greenberg, Executive Director, Center on Law and Security:
Nir Rosen is always provocative, but he crossed the line with his comments about Lara Logan. I am deeply distressed by what he wrote about Ms. Logan and strongly denounce his comments. They were cruel and insensitive and completely unacceptable. Mr. Rosen tells me that he misunderstood the severity of the attack on her in Cairo. He has apologized, withdrawn his remarks, and submitted his resignation as a fellow, which I have accepted. However, this in no way compensates for the harm his comments have inflicted. We are all horrified by what happened to Ms. Logan, and our thoughts are with her during this difficult time.

Call me a Luddite, but Twitter seems pretty much like all downside to me.