Twice in a row I've had this happen and just ended up laughing at the people who actually take it that far. Either way the other day I was running a normal T2 with random people.
The healer takes his time zoning it, sometimes this just happens. Well time ticks by so we ask him to hurry, he suddenly says "NO." Long story Short, He wont zone in because he would like to make the 4 other people wait the 5min to kick a group member AND to top that off he also told us he would purposely re-que just so we would have to wait another 5min.
Rift has turned into a getaway for some quite upset people. Shame..