You really are in a moral dilemma. What are your personal requirements & responsibilites in reporting this? Do you report these things to HR or do you wait for a request form HR before revealing a person's internet history? Normally I would say the JW's deserve the hypocrite, but the underage porn is a concern. What if he acts upon his desires with an underage person? His involvement in judging others at this point is in question, especially considering the shunning they will receive. It's your call. You will have to live with the consequences good or bad that result from reporting or not reporting. Just make sure it doesn't backfire on you and get you into trouble.
Also, never underestimate the Borg's ability to protect itself. They could simply refuse to believe you or look at your internet logs. He could simply be told "some accusations" have been made and that gives him the opoportunity to correct it or be more careful about getting caught.
Think About It