Nostalrius Begins - Quality wow vanilla realm (1.12)

Hello farming minerals i see a guy which power leveling a guy , at first look i think he is in party , i tested him tryed to invite him via horde and hes no party, so horde hit monster ,and hes kill that monster do its bannable ? if no then people can power level in instance whith no scare point ? And actually that is not friendly if hes see allyiance running around hes kill him , i log to my rogue to record him in stealth.. In a lot of server is not allowed to power leveling characters do we can do here?

https://www.youtube.com/watch?v=29E__W2oYJ8

Sorry for my english i'm just need to know, i can't find any information for its not allowed, my friend think to join to this server and i was think about like hes doing for level up him fast

it is allowed to powerlvl a friend or so.
mobtagging is also allowed.
they both are putting there time into this so idk why it should not be allowed.

you just simply cannot dualbox.

So if me and my friend enter dungeon i pull mobs , i leave party he do aoe and i all kill mobs hes get massive xp its still not bannable because its same thing ? and its mean for you can offer in world chat for power leveling chars for gold ?

Pottu - You can stay in dungeon for 1min after leave party , but what i filmed now thats we can do ?