Snapper5
In over thirty years as a professional in this industry, I've been extremely fortunate not to have needed the full support from the union. Those that have been less fortunate in their careers, and there have been many, have often been greatly disappointed in the lack of power that 'their' union had when they really needed them.
Please don't get me wrong. There are some hard working individuals out there fighting for your cause and may get results at times. However, my experience is that the union is far less effective than many would hope for or like to believe. When the chips are really down, Companies do whatever they like, regardless of how many shots are fired across the bows.
It's your 1%. Do what you like with it. Just don't base an airline career purely on union recognition. Enzo999 & RAT 5 both offer good advice.