It's funny to note that this is actually a statist policy - it's quite interventionist to prevent businesses from making contacts with certain types of unions if so they please.
That said, I don't have a problem with state intervention in business if it's addressing something that only the state can - I think it's the lesser of two evils here. I'm opposed to forced union membership. Support.
(I should point out before I'm accused of "Moderate Heroism" or whatever again that unions are one of the issues I've been fairly consistently "right-wing" on...)
No you're perfectly right. I couldn't care less about anything beyond the fact that I have no desire to ever join a union. My sister is a public school teacher and has all sorts of horror stories related to the union. I shouldn't be forced to pay union dues to maintain employment and unions these days have little to offer.