Kicking afk player from dungeon

[PerrinTaveren]

So, we were in a dungeon yesterday. At the start of the dungeon this player complained ''oh i hate this dungeon''. After the first boss he suddenly became afk, like 2-3 min he didn't return. We came to the 2nd boss and i used vote dismiss for afk to kick this person. The other dps said ''don't! wait we are together here'' but tank already pressed yes to vote kick and the afk player was dismissed. I said ''say something before going afk, just for you know, being polite.'' he said ''you don't kick someone who is afk for a few min''. and i said ''i can't know something that hasn't said. say you are going afk for a few min and no one will kick you.''

I just want opinions about being afk randomly in dungeons and how to react to those. Idk, if i was right or they were tbh.