Dimitar Mihov, writing for The Next Web:

This sort of moderation is more commonly known as “ghost-deleting.” The term is a little misleading since such tweets are technically not deleted, but merely prevented from appearing in users’ feeds. This measure, however, is usually reserved strictly for offensive tweets—and this is hardly the case here.

In other censorship-related news, Reddit’s /r/videos moderators removed the video of the passenger being assaulted on United Flight 3411.