https://www.siliconvalley.com/2023/07/31/a-flashing-x-was-installed-atop-the-san-francisco-headquarters-following-twitters-rebrand-a-city-complaint-says-the-sign-went-up-without-a-permit/

San Francisco  — In a complaint, the city of San Francisco says they have visited the headquarters of the company formerly known as Twitter twice since Friday regarding the new flashing “X” sign on top of the building.

According to the complaint, a notice of violation (NOV) was issued for work without a permit for the new sign that adorns the building where the social media platform’s headquarters is located.