As an FC that seems to have a problem with people actually x-ing up for roles, I am put in a position where I constantly have to assign roles to people, and I have 3 things to say about this,
1) If you are assigned a role and do not want to do it, as @Malcolm Galora said, I would deem it as failure to follow fc commands,
2) We assign roles to get people to learn roles, so they are more likely to x-up in future for that role.
3) You were not `targeted` my guess is most fc's that was met with a no when asking someone to take a role, would remove that person from the fleet.
As a little side note, when picking roles, I will primary go for people I see in fleet alot, and not taking roles.
Most people when picking roles, will look at the fleet composition, sort by ship type, pick one of the ship type needed, and that will be his choice, its completly random
I know I am only a trainee fc, but as I said, I have problems getting people to x-up for roles most of my fleets.