Kicking afk player from dungeon

[KaivaC]

Says they need to AFK for a bit = no kick
Says nothing and just suddenly goes afk and they haven't been back for quite a bit = kick

This is the rule I follow.

Same. Be courteous to your fellow party members and most of the time, they will be courteous back to you. Don't feel bad about your situation, OP. Maybe they had something serious going on, but they also need to keep in mind that if the other party members have no idea what's going on, they'll just assume afk, especially when they start off the dungeon by saying they hate a particular instance.