If you get trapped in a dungeon because you blocked people out of the daily quest then it's your own fault at the end of the day. It takes longer for them to load in, realise and leave then new people to join than it takes to simply wait on them in the first place... So if your to impatient to wait for them, why are you suddenly patient enough to hit LFP and wait for people to join, load in and catch up to help you?