Almost every attorney general in the United States on Monday came out against Facebook’s plans to launch an Instagram app for children, citing the technology giant’s history of failing to protect children’s welfare on its platforms.

The attorneys general from 44 states, including California, where Facebook and Instagram are based, sent a letter to Facebook CEO Mark Zuckerberg asking him to abandon his plans for the new platform, saying that it would be detrimental to the physical, emotional, and mental well-being of children.