Companies attempted to intimidate union organizers by blacklisting them. suing them. boycotting them. imprisoning them.

Companies attempted to intimidate union organizers by BLACKLISTING them.
Union organizers are those people in paid employment, who usually mobilize people to form workers' union in order to form a formidable unit that the employer will reckon with. Union formation is not favorable to employers, so they usually sack those workers that engage in union formation and in order to ensure that they are perpetually kept out of work, they create a black list, where they put their names, this list is circulated round the companies in that region so that no company will employ them.

Blacklisting is the answer, its everywere in all cites.

Idon’t understand a word going on right now lol