When Facebook arrived here, it quickly became an emblem for progress and freedom in post-Taliban Afghanistan.
But as a bitter electoral dispute takes hold of Kabul, both Afghan and foreign officials worry that social media is now worsening Afghanistan's ethnic and political fault lines. What once appeared to be a long-awaited outlet for expression - promoted heavily by Western officials - is now something the Afghan government is trying desperately to censor.
Already, Afghans on either side of the dispute have reverted to rhetoric reminiscent of the country's civil war in the 1990s. Ethnic Tajiks, supporters of presidential candidate Abdullah Abdullah, have taken aim at Ashraf Ghani, his rival in the June 14 runoff election, calling for his death. Ethnic Pashtuns have responded by emphasizing ethnic solidarity over national unity.
In other countries, this might be accepted as a part of a lively democratic process. But in Afghanistan, where the brutal war between the nation's ethnic groups is still fresh, many worry that vitriol exchanged on social media platforms will only precipitate bloodshed.
The Ministry of Communication and Information Technology plans to block accounts "that are posting inflammatory issues, insulting people and posting against the national interest and national sovereignty," said Nasrat Rahimi, a spokesman for the ministry. He said the government has contacted Facebook about the issue but did not explain how the accounts would be blocked.