They mostly switched to ruining your life but it's got a long history. https://en.wikipedia.org/wiki/List_of_worker_deaths_in_Unite... https://en.wikipedia.org/wiki/Anti-union_violence_in_the_Uni...

It's not that far fetched to assume that someone could be in physical danger after ruffling the feathers of a company that has hired a union busting firm. Union Busters have a long history of employing gun violence against striking workers.