3b: No grieving: no killing people over and over again while they grind in cc, are in save zone(and even in BP a few times same person could be fun but keep it to a limit). Also KS on epithet bosses or on Party Quest (mini) Bosses is considered as grieving.
3c: BP: Going to the Bloody Plain is at one’s own risk,when you go there you can expect to get PKd, after all it is a PVP/PK map. Don't go screaming for help right away, especially if you made the first move. This doesn't mean you don't get any help from league members at all.