Earlier quoted context omitted.
That is certainly the most amusing and dramatic explanation of what's happening. A simpler explanation might just be that Congress broadly supports what DOJ is doing, and cares a lot less about the integrity of specific online services than they do about DOJ's role in combating terrorism, nuclear proliferation, and foreign intelligence services.
The FBI's founding director had this very tactic as his modus operandi. It isn't hard to speculate that the culture of the FBI has supported political extortion for well over 80 years now.
Technology has made it a lot easier to discredit and disrupt political activists. An obvious example of how to map relationships to find potential organizers that might bring together a larger political movement is the NSA programs COTRAVELER[2], but the methods are not that different from "targeted advertising" or any Facebook-style social network.
Occupy terrified a lot of people in power specifically because it didn't have an obvious minimum spanning tree to target.
We even have documents from Snowden about GCHQ's version[3]. JTRIG even has a wide assortment of tools[4] available for disrupting and discrediting their targets. Their tool for "amplification of a given message, normally video, on popular multimedia websites (Youtube)" doesn't seem particularly useful for national defense or catching terrorists - they have other tools for feeding a specific target false information. On the other hand, amplifying the popularity of a video would be very useful for propaganda.
Obviously very little of this is proof. It was already frightening what J. Edgar Hoover was able to do decades ago. How would the same thing be done with the benefit of modern technology? Would you even notice it?[5]
A even better question might be: given how eagerly the advertising industry used tracking technology and data mining, would you consider it likely that a government agency with little restraint or oversight would refrain from doing the same thing?
[1] https://en.wikipedia.org/wiki/COINTELPRO
[2] https://www.washingtonpost.com/apps/g/page/world/how-the-nsa...
[3] https://theintercept.com/2014/02/24/jtrig-manipulation/
[4] https://www.schneier.com/gchq-catalog.html
[5] https://www.youtube.com/watch?v=oRzYJullFOs (14 seconds of Max Headroom)