Data is unable to regurgitate a comment in my style and pass it for something I have written. If a person were to do that, that'd be quite rude, but if it's AI it's perfectly fine? I do not think so.
That's not true in the case of impersonating someone based on public recording of them. You'll quickly run afoul of Right of Publicity laws. It's one thing to simply record people in public where they don't have an expectation of privacy. It's quite another to impersonate them.