Took me a while to get most extended family and friends trained to do one of two things:
1) Check it out on snopes.com before forwarding it to anyone.
2) Not forward it to *me* under any circumstances.
There were a few stragglers, and I finally had to specifically filter them out of my email. One particular “friend” changed email addresses when she moved back East – only reason I knew that is because I started getting BS forwards from her again after many months of blissful silence. So I edited the filter, and my inbox is once again relatively idiot-free.