The size of a Japanese comic strip really depends. Usually, they range from a couple of small panels to a more extensive layout that fills up a page or two. It also depends on the style and the story being told.
In many places, 18+ porn comics are considered illegal. This is because they can have a negative impact on society and violate moral and legal standards.
Comic Con is all about celebrating comics, movies, TV shows, and various forms of entertainment. There's no connection to porn. It's a family-friendly and enthusiast-driven event.
Generally, porn comics are not considered legal or ethical. They can have negative impacts on society and go against commonly accepted values. Laws exist to restrict their production and distribution to protect public interests and moral well-being.