A blog I read has a feature on it called "The Morally Corrupt". It lists all of the clergymen who have been arrested for various forms of sexual misconduct. I know there are pedophiles and sexual predators in all walks of life, sadly many of them in roles that we tell our children should be able to trust (teachers, coaches, police officers, etc.). But this, in my opinion most offensive, deplorable, disgusting misuse of trust and power I can think of.
Its also one of the most common.
Here is the list:
The Morally Corrupt