Don't trust online surveys. Online discussion is irresponsible, and the proportion of people participating in such surveys is different. Very honest children may not take part in the survey. You can look around you to prove it.
In fact, this incident is not too horrible, and it does not mean that college students are of low quality. This and incest are two concepts. On the contrary, it shows that college students in China lack self-protection consciousness and sense of responsibility, which should be strengthened in education.