I actually disagree with this. While breaking news reporters have a responsibility to cover current events in real time, I think the online experience would be greatly improved if the rest of us took more time for reflection before posting. Not only to learn more information about what we're writing about, but to decide if it's really necessary to post at all.
This is part of why I've been blogging less frequently lately; not because I have no opinions or concerns about what's going on (I have lots), but because I don't want to just add to the noise unless I have something unique and important to say. I'm also mindful that thanks to screenshots and archive sites, anything I post online might be available forever even if I delete or amend it later.
(This is solely a response to the sentence I highlighted, not about your views on the Trump shooting. I haven't read your initial story on that.)