This doesn't apply to all people who eat meat, just the trolls haha. So troll logic really.

Step 1: Troll tags which threaten your emotional investment in what you eat, while vehemently protesting that the person you are actively contacting is aggressive and attacking you. Be sure to throw out loads of logical fallacies, lead them in a circular argument, and then when you have too many points of logic to face begin to toss out diminutive remarks about how good meat tastes.

If you are especially not cowardly, don’t reblog them. Vaguely reference them and how stupid they are in a separate post, without actually listing reasons for why they are wrong and stupid. The less you talk with any logical basis, the more believable your case becomes. Be sure to diminish their standing with names like “extreme” “militant” and “crazy.” Facts won’t hold up when you put them in their place with some well placed labels. Definitely attack their imagined character, not the argument itself. Otherwise, they might have a sneaky way of making you look stupid.

Plan B: They bastards are onto you and have pointed out all of the above, to move forward their evil agenda, instead of laying down and laughing appreciatively at your remarks, what now? Begin wildly suggesting stereotypes that justify your behavior, up to and including comparing past vegan encounters with the Holocaust. Perhaps throw out some wild accusations- call them a racist perhaps, no one likes a racist. This will instantly help others see them in a negative light without any intellectual effort. 

The key being here, we need to throw the vegans off the trail with greater effort. To get a rise out of them, perhaps make a blanket statement about a time period no longer relevant. Eagerly talk about imaginary studies which prove that dairy cures AIDS and you need to eat meat to live (fear not, vegans almost never point out that they are still alive).

Rinse and repeat.