Memes of Production

I think there's a distinction to be made between "This thing is bad", and "Doing this thing makes you a bad person".

Telling people in a gentle and understanding way that they're doing something bad, is good. You just have to be very careful to adjust your language to the people your speaking to.
But saying that people are bad for doing the bad thing is pretty shitty, it might feel righteous but it's extremely unlikely to result in anything but alienating those you talk to.

This is why i'm "flexitarian", mostly just eat chicken and i try to eat as little as possible, but i'll eat the odd bit of other meat depending on circumstances. I acknowledge that eating meat is "objectively" bad, but that there's also a limit to how much i can actually change my diet without feeling miserable, and it's quite nice to be able to tell people "Well you can just do what i do, sticking to chicken is really not that difficult at all, give it a try!"