The Cannibalism perk allows me to consume the flesh of dead people, and eventually Ghouls and Supermutants too.
One of the first new meals I've decided to take after mastering Cannibalism, was a Feral Ghoul who clearly didn't understand his place in the Food Chain. Unfortunately, Nick Valentine didn't exactly approve of my new-found tastes.
Since I don't like it when people judge me by my tastes, I've decided to wander alone with Dogmeat. He's a good boy, by the way. Never judges me for anything I do. Still loves me, even if I unload entire magazines full of lead or plasma into his cranium.
In any case, I've started enjoying the culinary delights of Cannibalism. Until recently, that is. Now, I'm plagued with doubt. What if I eat too much? Am I going to end up with human meat addiction? Will I suffer from Ghoulification as a result of eating just one more Supermutant for the road? Are people going to fear me or treat me with disdain if rumors about my preferences for Ghoul meat start circulating?
Aside from boring companions disliking cannibals, what disadvantage does my new diet entail?