The body politic is at risk in Egypt. On the second anniversary of the Egyptian revolution — Jan. 25 — in a demonstration in Tahrir Square, a woman protester was violently set upon by a mob of men who grabbed at her private parts, pulling and pushing her from person to person until she was finally and with great difficulty rescued by teams of anti-harassment male activists. The roiling crowd circling around its prey was captured on video. She was not the only victim that night: Eighteen other incidents were also reported. And this was not the first time women protesters — and reporters — have been attacked by crowds of men in such demonstrations, their clothing ripped off, men’s fingers reaching inside their underwear.