I try to help. I really don't look at who it is. I try.
Now, if they get demanding. I walk away. No need to argue or whatever. I helped, or I didn't. You're not paying me, so my obligations to you are pretty darned limited.
Still, I'll try.
And this isn't criticizing anyone who makes other choices, whether to do more, less, targeted, not, who cares. Except for the aspects of this place that fall under my job (a bunch of it), this is just about trying to help. As a volunteer, you're under zero obligations. Further, there's more than one right way. Follow your path.