A very important part of today's favorable decision is this quote:

"The Taft-Hartley Act amended [NLRA] §§7 and 8 in several key respects. First, it emphasized that employees 'have the right to refrain from any or all' §7 activities." This "amendment to §7 calls attention to the right of employees to refuse to join unions, which implies an underlying right to receive information opposing unionization." Brown, slip op. at 6-7.