I hope you always charge this nincompoop for helping him. After all, if you help him for free, there has to be a catch, there has to be a law being broken. And I don't mean just helping him with his computer. Charge him for helping him trim his garden hedge, for helping clear snow from his drive, for keeping an eye on his house when he's away,
The bit of the teacher's letter that is quoted doesn't even say that she's a member of a union, let alone that specific one.
Anyway, I know where *my* union's money comes from and what it's goals are. The money comes from members and a very little bit comes from adverts in our magazine.
I'm one of that group. And yes, my beard *is* going grey. I've not used Windows for over a decade. I have no idea how to set up and configure a current Windows to be secure and to have a reasonable development environment. Nor do I care to learn, as I have better things to do with my time, like making tasty booze and grumbling about The Youth Of Today with their ghetto blasters and hard core pornography.
But if this lets me test my code on Windows before releasing it, and spot and fix stupid errors, then that's a Big Win. I still won't bother fixing any major Windows-only bugs (like Adam says, it's too big a time investment from which I will get no benefit), but the vast majority of bugs are trivial little things and I *will* fix those.
Genetics explains why you look like your father, and if you don't, why you should.