The insignificant nobody me feels that the thesis is well meaning, but looks like it was written by naive sheltered school kids who lived in Disneyland, & yet to live & work in the real world. Even within Disneyland, once the smiling costumes are taken off after a hard day's work, would reveal real Humans, with hopes & dreams that Disneyland cannot offer - mere $10/hr salaries, dancing & prancing, serving rich families, etc. The real world is NOT disneyland.
The greatest mistake the West made in WW2 was to disregard & banned the book - Mein Kampf - by Hitler. In it was written, outlined & clearly displayed what Hitler would do when he got into power. As a result of the ban, some were attracted to it, like moths towards fire, unaware of the danger. As good men were told & advised not to touch the book, those on the fence had none to discuss about the book, to discern facts from fallacies, etc, thus most of them believed every word in it as it went unchallenged, with deadly consequences when Hitler did gained power, resulting in a horrific war where millions died, either to support skin thin supremacy or against it, which could had been prevented.
With the explosion of social media, there will be equally explosion of ideas & perspective, and it cannot be shut down without dire consequences that will bring to Humankind's economic & social progress as greater inter-connectiveness is the way for evolution to move forward. Devolution is when we ban ideas & expressions, & presumed it would go quietly away from Human consciousness. It will NOT.
An ideology CANNOT be shut by bans, censorships or bullets, or whatever tyrants can dream of, as proven in Humankind's successful War on Radical Islamic Terrorism. It can only be REPLACED by a BETTER & honest ideology, to progress & evolve Humanity, as proven by reaching out, challenging concepts, misinterpretations & perspectives, & bringing in inclusively onboard the Muslim communities TOGETHER to counter Islamic radicalism - a proven BLUEPRINT to eradicate harmful ideologies - economic or societal.
Rather than ban, it would be better to engage & turn perspectives away from presumed 'toxic communities'. As for the word used 'obscene mediascapes', it is offensive to Humankind. It is from sex that Humankind are born. If sex is obscene, then none of us would be alive today.
It is agreed that within sexual acts, there are many forms that may be weird to straight laced victorian prudes, but so long as none is harmed, each is a willing party, there is no cause for concern. Of concern will be child porn, human trafficking or other harmful acts that needs authorities to take against such, to protect the vulnerable. There is no better place to do so than on sites where the majority of such deadly perverts gather to share info, for the authorities to silently gather evidences, trace & track them, than for authorities to search in the open akin to finding a needle in a hay stack.
If forming communities of like minded individuals are to be referred as GHETTOIZATION - then our world's habitats would be one big Ghetto, the rich in their ghetto enclaves, the poor in their ghetto slums, etc, as well as EVERY site on the internet that has a forum, & to be derogatorily listed as Ghettos too.
In summary, where it is bright, light would not be needed, but only in the dark that light will be needed, to dispel shadows & light a path for Humankind out of the darkness. Would the naive yr 2020 thesis author had understood this?