There is no evidence to suggest that OpenAI is engaging in mimicking Scarlett Johansson's voice without her consent. OpenAI is a non-profit artificial intelligence research organization that strives to ensure the responsible development and deployment of artificial intelligence. This includes respecting the rights and privacy of individuals, and obtaining consent for the use of personal information. Therefore, it is unlikely that OpenAI would engage in any activities that may infringe upon Scarlett Johansson's rights.