How many people do you need?
Majority needs to attend the fair at one given night.
How long will it take to come into action?
The one night people are away at the fair.
I think the aspect of my role, or at least the aspect that makes it balanced, is the fact that I have to convince the town of this majority, but if I actually tell them what it does, the scum will be prepared for it as to minimize its effect greatly.
And I'm sure you could think of a scum role that could adequately prevent an expected event from occurring.
However, I was fairly certain that support would not be difficult to get, considering:
1. A role so game breaking that it can ruin the town in one night probably isn't going to be in the setup.
2. If my role isn't confirmed you can always lynch me later.