I think websites who are hosted on the darkweb/tor will slow down the amount of spamming and trolling posts by keeping the website hidden from most people including spammers and trolls. There are less people who know how to access the darkweb by using a TOR proxy and web browser.
Hosting a site on Darkweb/TOR will cause it to have fewer visitors, trolls, and spammers, so there will be less spam and trolls from people who are too lazy to learn how to use the darkweb/tor to access tor websites.
Hosting a site on Darkweb/TOR will cause it to have fewer visitors, trolls, and spammers, so there will be less spam and trolls from people who are too lazy to learn how to use the darkweb/tor to access tor websites.