I guess that might be the case in some areas, but where I've been it's never been a secret who is and isn't afraid to confront management (or at least those they interact with most daily). The ones who have read the contract feel more emboldened to stand up and the ones who haven't retreat, but that was largely the case even before the "2/3rds" ammendment was ever used as an end around for seemingly the sole purpose of circumventing the collective bargaining process. "Collective" should apply to those members that care enough to vote and not to those that routinely forfeit that right. It's not as if an incumbent elected official can override an election where he she lost the vote total because less than 2/3rds of eligible voters showed up at the polls. Hoffa or no Hoffa (I personally prefer no Hoffa) that 2/3rds hash needs to be thrown out. Theoretically, that's something achievable without the company being able to directly intervene to stop from happening.
I don't believe there's a high risk of enough members crossing a picket line for the company to survive a work stoppage. The overwhelming amount of full time drivers would unite for enough length of time. There's already such a high amount of daily no-shows on the preload shift without a strike. If they won't come to work without a strike then they are even less likely to show up when there is one. Even in the event that they did, it's not as if most of them are gonna get the packages to the customers regardless assuming there were any to misload there to begin with.
