I really have no problem with ALPA, and I signed up during their most recent drive, though it never came to a vote. It's true that ALPA has been an important part of a lot of positive changes in the industry and I can understand why a member would be proud of those accomplishments. However, I don't think that your arguments hold much water in insisting on another pilot group joining your union or looking down on groups who choose other unions or not to unionize.

Claiming the flying public helps pay for part 117 or improved training through AQP or anything else that ALPA does is like me claiming that I helped pay to support shipyard safety improvements because I took a cruise to Alaska, paying a fare that was set by market competition. Yes, my ticket money went to a cruise line, who then bought a cruise ship from the shipyard, who then paid people to build the ship, who paid union dues, who paid lobbyists to lobby congress for safety improvements. But I didn't contribute 2% of my salary towards those efforts and to equate me to them or even to compare us is disingenuous.

Unionization (employee groups collectively bargaining with management) and lobbying Congress are two separate things, even though ALPA and many unions are involved in both. Unlike unionization, lobbying Congress doesn't work by everyone pitching in.

I'm not a member of the NRA, but I can still buy a firearm. And I'd be pretty put out if someone demanded that I join the NRA just because I owned one.
I don't go around insisting that everyone contribute to President Trump's reelection campaign or the RNC if they received a tax cut.
Nor did I insist they contribute to President Obama's reelection campaign or DNC if they benefited from Obamacare.
If I were a woman, I could do as I wished with my own body before a certain point in pregnancy even if I never contributed to Planned Parenthood.
I can prevent my daughters from legally killing my grandchildren after that certain point in pregancy even if I never donated to the National Right to Life Committee, and never do in the future.

Am I "free-riding" off of all the hard work of the NRA, and President Trump's and President Obama's staffs and contributors, and all of the other lobbying groups out there from which I might benefit? You could make the argument, sure. We are all "free-riding" off of other peoples' hard work every day. That doesn't mean we're obliged to financially contribute to future lobbying efforts by those organizations, or should be belittled or denigrated because we choose not to. We just shouldn't complain if those future efforts fail after choosing not to contribute. And we can, individually, contribute to lobbying efforts if we so choose.

An earlier poster got it right. There is a significant feeling here that the threat of unionization at OO gives us more negotiating capital with SGU than an actual union would. Therefore, so long as management keeps us in the top 25% or so of our competition in pay, QoL, job security, etc, I find it unlikely we'll ever vote in a union. That doesn't mean that we're anti-union, that we believe other pilot groups with different managements shouldn't have unionized, or that we deride other airlines for their unionization, and for the earlier poster who accused us of doing so, it's simply false.