No, no, and no.
Will they stop mining if no-one holds their public shares? Lol, no, lots of privately held mining companies exist who tend to perform even less ethically.
https://en.wikipedia.org/wiki/Hancock_Prospecting#Attitudes_...
So, if they're going to dig the stuff up to sell to China anyway, I'm happy earning some money from it. I don't endorse their behaviour, but I do endorse the 10 - 15% return I've been getting on something they're doing already.
Your vote may be paltry, but it’s still your vote. Use it wisely. It matters.
I think you do endorse the company whose shares you hold, in particular if it’s public knowledge.
This is the part I don't understand. You generally buy stock from other stock holders. The company doesn't get the proceeds.