Responses
It isn't a new trend. There have always been popular BL stories with violence/sadism in it (horror has also always been a part of BL but it's not as popular as violence/sadism alone) . The only thing that's different now is, that the stories are longer since many of them are webtoons which also means that they get more attention compared to the one shots or on volume long BL manga (most sadistic/violent BL manga aren't that long).
Agree.
Is this a new trend? All this kidnapping stuff and violent/sadist seme? I never expected the genre coming to this. Years ago yaoi was mostly smutty and cheesy.