The only kick you may see is : people afking while dead, tank beyond trash level (the only time I saw a tank kick was on Galakras a DK who was totally unable to maintain threat on more than one mob).
Even right now as I'm writing, I wiped on Malkorok because of every single melee were behind the boss in the cleave phase (caster killed, then tank killed, then wipe). Not a single of the melee were kicked. One tank leaved and we are wainting for a new one for the next wipe (because clearly 1 determination is not enough with abysmal DPS, having 3 ret under 70k for exemple)
If all amazingly bad players were directly kicked as you may think, LFR wouldn't be a problem as it is now. Wipe once, kick the bad, clean the rest would be the common LFR. It's sadly absolutly not the reality (at least here in EU LFR, may be different in US ?)