hosting a child or teen this summer?

Hello, I am interested in hosting a child or teen this summer. If anyone has had experience with hosting before, if you could share anything and as much about your host experience that would be so helpful. I am trying to get an idea of how many host families have overall good experiences. The biggest thing holding me back is the fear of the child/teen having reactive attachment disorder and violent behaviors such as trying to physically/sexually abuse other kids, hurting pets, starting fires, etc. I know these cases are rare, but the risk is still there. But when I look at blogs/fourms and read about how many people have had positive hosting experiences, it makes me believe the likeliness of a positive experience outweighs the chance of a horrifying one. So if anyone has ever hosted a child/teen from ukraine, latvia, china, etc. and could share specific info on the ups/downs of their experience, that would be so helpful! Thank you!