Not every message needs to be tailored. And not every message need be the same across every medium. Having a write API doesn't force anyone to do either of those things. It would not give or remove anyone's ability to tailor as needed or broadcast verbatim as desired. Having a write API would allow 3rd party apps to add G+ to your options but doesn't force you to act any way you would not already act without the write API. My point was that having a write API doesn't have to be bad... but some abusers will ruin it for the rest.