Interesting, thoughtful discussion of the issue, although I still disagree. The rules against harassment should apply to everyone equally. I think the “Twitter Rules” also somehow need to be adapted to ban lying–deliberate or negligent–or any attempt to manipulate the vulnerable and uninformed. There may be a legal right to lie (unless you’re under oath or advertising), but there’s no ethical right to lie (short of doing so to protect someone from harm).
From my perspective, this reflects a systemic problem in the tech industry that comes from the fact that when they roll out new technologies, they always ignore the fact that ordinary human beings are going to use (and abuse) them. Look at all of the ethical issues that have caught the industry from behind going back to Napster: downloading digital media and copyright violations; privacy; cyberbullying; etc. The industry has never been proactive in dealing with issues that could easily have been predicted. Even the most basic perspective on ethics argues that if you can foresee harm and prevent it, you have an obligation to do so. Add to that the composition of the lack of diversity in the industry’s workforce (astonishing, given the fact that is 2016) and you can see that we have an industry with major weaknesses in identifying and handling ethical issues.