While a perfectly fine rule of thumb in general, I think you might find the sticking to "I don't care what other people do" as an overriding principle doesn't hold water in a substantial number of edge cases. One such case is where someone is willfully influencing others to act against their best interests, or against the best interest of society as a whole. That's when one needs to make a judgement call on a case by case basis. Is this such a case? Not sure. I just wanted to point out that "I don't care what other people do" can't be your guiding light, always.
I "don't care" what others do in the strict sense that I don't let it influence me.
But I can tell you that me quitting socials did impact relatives and friends to quit those too, and thus I absolutely do not relate with his statement:
> It doesn't matter whether you abstain from using Instagram or not
I'm glad that you were able to convince all your meaningful friends and family to change their social media / internet behavior according to your values - but please don't assume that it's a viable option for everyone, with no downsides.
While a perfectly fine rule of thumb in general, I think you might find the sticking to "I don't care what other people do" as an overriding principle doesn't hold water in a substantial number of edge cases. One such case is where someone is willfully influencing others to act against their best interests, or against the best interest of society as a whole. That's when one needs to make a judgement call on a case by case basis. Is this such a case? Not sure. I just wanted to point out that "I don't care what other people do" can't be your guiding light, always.