Just to be clear, we're talking about killing people, yeah? "Environmental mercenaries...who will reek havoc on those who pollute or endanger the planet," as stevespang put it. That is, literally, terrorism, even if the goal is laudable. Knowingly selling toxic, deadly products out of greed is a horrible thing, but it is literally not terrorism.

You seem to think that "terrorism" means "anything dangerous that bad guys do."

> Nobody will be against punishing people for allowing willfully contaminating products and then decieving you about their safety.

Absolutely not true. When you turn to terrorism, you lose the moral high ground in the eyes of most of the international community. It's so easy to spin that against you to discredit your entire cause; to convince people who might have been sympathetic that you're just a violent psychopath after all.

Do these bastards deserve to die? Maybe. I wouldn't shed a single tear if they were killed. That doesn't mean it's a good way to achieve your goal, if your goal is long-term change instead of short-term vengeance.