yes this happened to me to, from a semi full guild except one slot and guess what?
They had cleared everything but last boss and decided it would be fun to get people in and kick them out over and over.
I had my instant CD on top of waiting for another 2 hours for Instance matching once it was over........
That needs to be fixed
I've had similar happen to me as well, being kicked before even getting to type out a greeting. Part of the problem (though not the source of every instance of this) is that parties have gotten smart to the bonuses of LFD and want those, but without dealing with the randoms. So they make a 4/5 party with a 5th person already planned. The 4/5 go into matching as a party at the same time as their single 5th. The party then kicks anyone who hits that open slot until their pre-selected 5th gets in, since both going into matcher at same time doesn't guarantee they'll be paired first time.
There needs to be a way to discourage this practice or look at lessening the effect of the cool down timer if kicked, based on how long you even got to be in the zone. There are times when kicks are needed realistically, but someone who didn't even get to do anything in the zone shouldn't be punished with cool down and be allowed to re-queue immediately.
I know, i saw the opportunity to make commentary on the game though so i took it.