How does this valid argument:

"I don't like the actions of senior staff at XXX company. Thus, I'm not going to buy their products, and encourage other shoppers to do the same."

Become this wacko argument:

"I don't like the actions of senior staff at XXX company. Thus, I'm not going to buy their products, and seek to prevent other shoppers from buying their products, even if they disagree with my point of view."

???