Teamsters, or any union can request a member list of information from the company. The NMB condones this type of informational sharing and is afforded by law.
Yep thats how they got my address. When the reamsters made a run on FX several years back I and all my co workers had a visit from a reamster rep. They guy who came to my house to tell me how the great benefits reamsters would offer me as a mechanic. He was a nice enough guy I asked him what he did. He said he was a UPS truck driver. I said no offense but what could you possibly know about my job and what they can do for me? I told him no offense but when I worked for NWA it was the same thing. The ramp ran our local when I was IAM there we didn't have a say on anything. I told him you are not an aircraft mechanic and do not know what my issues are and I resent being in an industrial catch all union. Also add to that I told him Hoffa flew on NW when I was on strike there. I said that alone would ensure I would never sign a reamster card.