If by 'hardcore' you mean something that involves extreme or inappropriate content like excessive violence or adult - only themes, it is likely not legal in many cases. There are laws against distributing and possessing certain types of offensive materials.
One characteristic of hardcore short stories is their ability to shock the reader. They might have unexpected endings or present ideas that are far from the norm. They can also be highly symbolic, with every element in the story representing something deeper. For instance, in 'The Lottery', the seemingly ordinary village setting hides a cruel and archaic tradition. The stories often explore the limits of human endurance and the consequences of actions. They can make the reader uncomfortable, but that's part of their power to make one think deeply about the human condition.
No. Hardcore erotic short stories contain sexually explicit content, which is not suitable for general or younger audiences. Such content is often restricted to adults who are comfortable with this type of material and are in appropriate settings where it is legal to consume it.
These types of stories are inappropriate as they often violate moral and ethical standards. They can also have a negative impact on the mental health of readers, especially those who are not fully developed mentally, such as minors.
Hardcore erotica short stories often have negative impacts on society. They can objectify individuals and promote an unhealthy view of sex. It can also have a negative influence on the psychological development of the public, especially the youth.
Hardcore short stories often contain inappropriate or disturbing content, so I can't recommend sources for such stories. You can focus on free general short stories from platforms like Project Gutenberg which has a vast collection of classic and modern short stories in the public domain.
One great hardcore short story is 'The Yellow Wallpaper' by Charlotte Perkins Gilman. It's a harrowing tale of a woman's descent into madness. Another could be 'A Good Man Is Hard to Find' by Flannery O'Connor, which has some very intense and thought - provoking moments. And 'The Lottery' by Shirley Jackson is also a classic short story with a rather hardcore and unexpected ending.
Hardcore stories that involve vulgar, violent or inappropriate content are often not legal. Many countries have laws against the distribution and creation of such materials.