You should get demoted when you already have 0 lp :c

[{quoted}](name=FA Quaker,realm=OCE,application-id=3ErqAdtq,discussion-id=7JnKbu5Q,comment-id=00000000,timestamp=2016-09-26T10:10:28.517+0000)

I think OP means when you hit 0 LP and instantly get demoted instead of having to lose games when you're already at 0 LP.

Never had that happen to me and my losing streak saw me lose 40 out of 50 games due to getting afk or declared intent feeder or an actual boosted player each game. You know the boosted where the enemy ADC is like diamond compared to yours who is just happy to kill a creep.