1) Yes, I believe reality shows are both cruel and embarassing for the participants.
2) I think that there should be a minimum age for participation in reality shows, because the child's mental state can be irrevocably damaged by some tasks during reality shows and actions other participants perform.
3) I think people enjoy reality shows because of their hidden desire of seing others do what they would never do themselves.
4) There are several shows that are popular in my country. For example, "Дом 2" and "Битва Экстрасенсов". The first one can be considered bad, while the second one is probably good.
5) I would like to be in a reality show because I enjoy stepping out of my comfort zone and overcoming challenges.