1, I always knew Lucy Van Pelt was a terrorist! You just had to look at her treatment of her fellow Peanuts gang.
2. I am kind of surprised, This is very old news (perhaps not the article itself, but the revelations it is trying to bring out).
3. In answer to your question, nothing beyond what is being done. The Public tier has the right to speak their minds. And as the article states, they are careful not to conspire with the terrorist tier. So in a free society, there is nothing and should be nothing that we do with the first group (other than ignore them).
4. But the tangent (and you thought it was going to be a kumbaya moment). If you read the article and start drawing parallels, you see that there are a lot more than ELF/ALF doing it. (And no, even though my Avatar is ALF, I have nothing to do with them).
Muslims are doing it. They are even going farther in that the first group is not only not colluding with the second group, but it is also trying to deny its existence!
While the public tier of ALF/.ELF can walk around freely, the one thing they cannot do is convince everyone (just the useful fools) that there is not a problem. And I do not think they are even trying as they AGREE with the terrorist tier and defend them in public.
But the Muslims try to pretend that the terrorist tier does not exist and that anyone claiming otherwise is just a bigot. That is why there is less animosity for the public tier of ALF/ELF (a lot of ridicule) than for the Public Tier of the Muslim world. Most people do not like being called stupid, and that is what they are trying to do.