IANAL, but my understanding is that it is illegal to treat unionizing differently than other social activities. If a company wants to ban unionizing on company

IANAL, but my understanding is that it is illegal to treat unionizing differently than other social activities. If a company wants to ban unionizing on company time, they have to ban all non-work related socializing. If people are allowed to talk about movies & video games, they are also allowed to talk about unions.