In an average manga, an otaku under the bed would be a worse nightmare for a Japanese girl than a monster under the bed. It's pretty much only this specific gal/hottest girl falls for an otaku genre where the otaku aren't looked down on, discriminated, and even bullied, just for being an otaku. Though also in this genre such mistreatment may be present, as a hurdle for the MC. Or course otaku being the major consumer group for manga, rarely otaku are actually made to be the villains, so their treatment is being typically depicted as unjust, even if the otaku were mere side characters.