This thread is full of people commenting on both sides of the question so obviously there's no "you can't have an unapproved opinion". What you can't do is toss obvious flamebait, for the same reason you don't get to toss lit matches at a gas station. You can describe that as "you can't have an unapproved smoking device" if you want, but it's misleading.

https://news.ycombinator.com/newsguidelines.html