To be clear, I was never confused about bomb or vengeful. My point is, if villagers have abilities that have the potential to kill, that wolves can actively avoid (by not being on a yeet, or by only being in a certain position on a yeet, by not targeting someone for a NK), they like to know about this. I used the example of a bomb from RvB to give a concrete example, but by a similar logic I hope we can see that as much as wolves would hunt to sniff out a bomb, so they can plan their NKs accordingly, that wolves would also appreciate knowing if there is a vengeful. It won't necessarily mean that all wolves avoid getting on a vote or jumping off it, but it is something they care about and can plan around.
In fact, didn't someone fake claim or hint at having the ability to take someone down with them in RvB? I distinctly remember wolfchat with
@TelemarketingEnigma and mkg where we had genuine concerns there might be someone like a vengeful, and it did indeed factor into our strategizing.
In any case, when wolves know there is a vengeful, especially if they know how it works, they can plan to deal with that in various ways, which can potentially lower the utility of it.