(Loren Elliott | The New York Times) A landscaping crew replaces grass with stone at the courtyard site where the political activist Charlie Kirk was fatally shot last week at Utah Valley University in Orem, Utah, Sept. 15, 2025. After authorities said Kirk's suspected shooter had been "radicalized" online, Meta, Reddit, TikTok and other platforms have stayed quiet — though not Elon Musk, who owns X.