I understand all versions of the same history. I'm not a vegetarian, nor a vegan, as I say, I love jamon too much to start eating only green things, but I really accept those whose convictions made them not to eat meat.
I live near a chicken farm, and also I'm right now working in a promotional video for a factory of iberic products (iberic pork). I saw all the controls they had, the way they treat the pigs, and I gotta say they do all they can for the animals not to suffer.
As DaWacko said, I don't think those who are vegetarians becasue is cool, or a new tendency, or even because is a good way to loose weigh (I know all kind of people) should be take in consideration. But those who do it for their beliefs, because they think is their way to colaborate with the enviroment or wathever, just go on, but please, don't tell me to stop eating my good jamon (unless is jamon york, after seein how they made it I'm not going to eat it never again)