I am amazed that he and the elders think that you are capable of endangering his spirituality. Their little house of cards must be so fragile that it can be toppled easily.
Anyway, here are my suggestions:
Gather up all of the old mags that you can find. Most Witnesses have stacks of them. Print his name and phone number inside them, along with the address of the NAMBLA (north american man boy love association) web site, or any other damaging thing you can think of. Distribute them to local laundromats and waiting rooms.
Insert a note into an old mag saying (help, I am trapped in a cult - call police immediately). Leave the mag in a stranger's mailbox.
Type up a short note, indicating that JWs are forcing you to go from door to door. Sign his name and place it in a mag. Distribute.
Get a hold of all of the JW e-mail addresses that you can find and sign them up on as many porn web sites as you can. The spam will never stop.
Write a heartfelt letter to the Watchtower society, indicating that you have serious doubts, and hinting at hidden sins. Sign his name.