Hey, Nismar. I was the very first person in the history of Scott Paper company to transition from a salaried non-unionized position (process chemist) to an hourly unionized position (machine-tender on the world's most advanced high-speed coated paper machine). The resistance from HR was incredible, but I wanted that experience and the money (I doubled my take-home). One of my best friends' father was president of the union, and he threw the support of that union behind me so that HR eventually relented, though not without throwing lots of barriers in my way.
I became my shift's shop steward, and became the paper machine crew's representative on the contract negotiation team. During negotiations, I grew to be very good friends with the mill's new production manager, and we spent many, many weekends together afterward running white-water rivers in canoes and kayaks. The nasty truth about demonizing unions and their members is that aside from during contract negotiations when they want to make "greedy" union workers look bad in the press, large companies are quite happy about having collective-bargaining contracts. Their wages, benefits, pensions, work rules, etc, are all laid out for years in advance, giving them stability and a sense of certainty throughout the duration of the contract. I have been on both sides of that divide.
BTW, the work rules in our contract were not too permissive. Miss more than one day in a month without medical (or other) documentation? Verbal warning and a notation in your records. Miss another day in the next 90 days? Written warning and 3 days off without pay. Strike 3 and you're out. I mean fired with no chance of reinstatement. Our contract also stipulated that any shift could be held over for a double with no warning. Go into work a 12-hour shift, and get held over for a 24 because of a massive mechanical failure? Suck it up.
My brother-in-law used to rail against unions constantly, and say "nobody is worth that kind of money" regarding wages at the paper mill. I offered to recommend him for a job there, and his response was "no way I'd put up with that crap!" He knew that I often missed family outings, birthdays for the kids, etc, because of the shift-work, and that my wife had to cancel our on engagements for me when I was held over for double shifts. He was jealous of the good wages, but was unwilling to make the commitment necessary to earn them.