I don't either participate or condone with ELF. Terrorist action will not change anything in society, but only make it worse. Blowing up a car dealership, and things of sort. Only make a statement and a crude one at that. It isn't going to stop the majority of society buying cars, and wasting oil. They'll just buy their car from somewhere else.
With Crimethink. The bohemian vagabond lifestyle of dropping out, quitting you job, and dumpster diving thinking you will actually change the planet. It won't, just changing you outlook on life.
I've actually read Crimethinc literature, but the thing with that it's not a real organization therefor anyone can write a book or zine and put the crimethinc logo on it. I've did some wheat pasting, and stickering of their material, but my no means think I'm some sort of revolutionary and actually making a difference.