What is Unfair Corecion Against a Union Under the National Labor Relations Act?
The answer will be a matter of subjective determination for the court based on all the facts and circumstances involved. It is possible that the management may justify their request as motivated by security reasons. In litigation matters, it is common not to allow opposing parties to have unsupervised movement and access while on the business' premises.
Coercion is defined by reference to the will of the speaker - does the speaker intend to perform an act for no other reason than that the listener is in favor of the union? The speaker's intent must be inferred from the circumstances as they appear to the hypothetical reasonable person. Thus, employer assertions that "serious harm" will result from unionization are generally not an unfair labor practice while assertions that the employer will "bargain from scratch" are unfair labor practices.