There has been an enormous surge of counterintelligence efforts to hide "conspiracy theories" regarding the Las Vegas shooting, much more than we've seen before - and of course there's a good reason for it. If the NSA really was there to prevent these kinds of things, then all of the ones that have happened up until now would simply not have; they are deliberately set up to happen so that they can be used as political weaponry.
However, if we the people were to dig deep enough to unveil the truth of this incident (among others), there would be such a backlash that a revolution would become inevitable, and that is what the rich and powerful fear the very most.
Expect incidents like these to happen again, but keep in mind who benefits from them. Do your research, and share the truth with everyone else - this gets us closer to the freedom we all yearn for and deserve.
RE: YouTube "Tweaks" Its Search Algos After Las Vegas Conspiracy Theories Go Viral