If the law doesn't explicitly outlaw BIGCORP's actions (yet), and we all kinda know that it should, then opposing BIGCORP is the correct thing to do.
If Amazon is acting legally, yet in an ugly way, to suppress workers organizing, it seems hard to complain.
Now, if Amazon workers exercise the right of free association in their spare time to stick it to JeffB, well, it sounds like he's got a problem.