Found this neat site (was searching for good World Championship jokes - was not disappointed)
Plenty of good JW jokes:
I warn you, jokes about other topics can be quite rough and crude (not without reason called SICKipedia...)
Some of my favourites:
"Why don't Jehovah's Witnesses celebrate Halloween? They don't like random strangers knocking on their door."
"How many Jehovah's Witnesses does it take to change a light bulb? Three: one to change the bulb and turn it on, the other two bastards to knock on your door and ask if you've seen the light..."
Always good to have a good laugh.