In the Tokyo Ghoul manga, cursing does occur to a certain extent. It helps add to the raw and realistic feel of the world and the characters' emotions.
Well, characters in Tokyo Ghoul fanfiction could be watching the political maneuvering within the ghoul society. There could be power struggles, and different factions vying for control. They watch as leaders rise and fall. Also, they might watch the efforts of the CCG (Commission of Counter Ghoul) to eradicate ghouls, seeing the new weapons and tactics they develop.
In a Tokyo Ghoul fanfic, the characters could watch things related to their own kind. For example, they might watch underground ghoul fights. These fights are not only a form of entertainment for some ghouls but also a way to test one's strength and gain respect within the ghoul community. Additionally, they could be watching old videos or records left by previous generations of ghouls. These might contain important information about their history, forgotten powers, or ancient ghoul cultures.