@skieurope: the main difference between boarding schools and other situations is the period in which to groom someone is much longer and intense. In almost all boarding schools there are faculty members who live on the same floors as the students, in many cases right next door. Added to this fact, the kids are hundreds or thousands of miles away from home, and look to the adults.
Summer camps the period available to groom is far shorter, and there is a lower likelihood, IMHO.
@laenen: I tried to find the Safe Sports course you wrote about, and couldn’t find it. Could you post a link or send me a PM? Sorry to hear about your experience in parochial school.