I'm not sure what the EFF could put in such a guide. If the police believe you are involved in child pornography and get a warrant they will at a minimum come to your house and seize all of your computers to gather evidence. I can't imagine what exactly training the EFF can give people to prevent that from happening once the police show up.

And chances are that if you're tech savvy enough to run a Tor exit node that you'd rather not loose all of your computers for the several weeks or months it might take to get them back.