Many companies, from J.P.Morgan to Apple, initially banned ChatGPT use, often because of legal concerns. But these bans had a big effect . . . they caused employees to bring their phones into work and access AI from personal devices. While data is hard to come by, I have already met many people at companies where AI is banned who are using this workaround—and those are just the ones willing to admit it! This type of shadow IT use is common in organizations, but it incentivizes workers to keep quiet about their innovations and productivity gains.