Some idiot in Oregon, I do believe, did this to SUVs at a dealership. He ended up being sent to prison for 22 years. His supporters (the ALF/ELF types) screamed that the judge just didn't understand that this was "protest," not criminal. I think the judge understood perfectly well what this was all about.
I agree, there are LOTS of these "activists" in Oregon and they often bus into Washington to start trouble at our political/business events. They will be here today as President Bush arrives - count on it. They apparently have no jobs, proving they are being funded. Please buy FReeper Carry_Okie's book. He documents how foundations get $ from big corporate donors, only to take that money and fund local terrorists activists who later riot at the corporation. His book about the environment is fascinating.