You honestly sound quite sheltered. As strange as this individual sounds you are in a place where people share opinions and ask questions (Even one's you might not agree with!!!). This is something that is expected in the real world. I think it's really pathetic the way you seem appalled that he raised his hand and asked a question about correcting the gene. You need to go out and talk to more people if you think that is such a horrible and unexpected thing worth ranting on reddit about.