Ahead of the new school year, a handful of tech companies issued grim warnings to American educators embracing artificial intelligence in the classroom: Chatbots, they said, could endanger students and lead to self-harm. Vigilance was paramount. “The risks of students using AI can literally be deadly,” one company cautioned. Another noted: “Student lives depend on it.”The “it” is the software those companies are selling — tools that themselves use AI to scan students’ conversations with chatbots...