Retrying the same Leve Quest
It is common pratice for players to have a static group who have the same leves, they make sure to link all of their leves to get the max SP, then fail the leve after killing all but the last require monster for the leve, this insures they can retry the leve in 2 days when the leves reset. Once the reset happens they repeat this action, which insures the maximum ammount of SP from leves every 2 days by doing the same leve's over and over, with out ever completing them.
My question is:
Is this pratice ok, or is it viewd as an offence?