So a friend of mine was healing for Snowcloak and disconnected due to lag during a fight. He was maybe out of the game for 90 seconds, and within that time the other party members had already kicked him from the party. To his surprise though, he had incurred a 30 min debuff preventing him from doing the Duty Finder.

Not sure if this is real or a fluke, but vote kick abuse is a real thing in the game right now, and I really hope that this doesn't become a problem just because 2 people decide that they want to start trolling people by keeping them out of Duty Finder.