I guess all you can do is walk your sermon. Sometimes people notice that my five-year old phone is faster and more reliable than their brand-new, cruft-infested one, and they ask why. If people ask me why I don't deal with Google, Microsoft, Amazon, etc., then I tell them. Otherwise it's not worth the hassle.
If I wanted to cram my values down other people's throats, I'd start with my veganism ;) At least people understand that, whether they support it or not.
Lars.