1. KMS allows this "suicide" method to farm "droplets." ( now if you are new player or do not know what the droplets are for, you SHOULD NOT be part of this argument and saying the new ban policy is totally acceptable.)
-> you simply cannot meet the end game boss requirement WITHOUT farming droplets. and it is INPOSSIBLE to farm enough droplets without suiciding to stay in certain lv. range to farm them. Thus, KMS allows it
Potion lock is overkill on this mob. An AFK person will die regardless of potion lock or not.