As far as the hoax thing is concerned, when it's one of those.. I email the entire list, telling them not to email it on. With an explanation. And I normally get an email from the original sender saying "thank you", though they may be being sarcastic, they get the message.
Also, if it's a hoax one, I really bite their head off..tell them not to dare send me any CC email EVER. In the explanation to their list, I tell them that one wrong person gets the email or a person whose computer has been compromised, and then everybody's email address is very easily in the hands of spammers.
Though in one case, for a CC email not a hoax, and I didn't want to say no to those ones, I gave them another email address to use for me. I tell them about BCC but it doesn't help.
A big problem is religious people getting an email about praying for somebody, they really think the more people get the email the better, and they can't sleep unless the send it to their whole mailing list with intsructions....to send to more.. They leave me out of it now though. And I guess some of those might not be hoaxes!