Just remember- a Union is only as good as its MEMBERS. Union. United. UNITY.
The strength of character (or lack thereof) at the local MEC level often determines how successful and united a local council is. If you do choose to unionize (which certainly has upsides and downsides IMHO), make sure that you also take the time to learn the facts about the union- how it works, what role it plays, and what it can do for you.
Most importantly, step up! There are plenty of things that you can do to help- some big, some small. Not everybody needs to carry the weight of the union on their shoulders. In reality only a very small percentage of the pilot group needs to do really heavy lifting (MEC officers/status reps). But for a strong, organized and collective union, everybody needs to help out in one way or another.