no, if he joins with other nick so keep him unignored, its not that hard to ignore. current system is fine but when player's account is transferred then make him stay ignored.
It does not really help much( besides, you can easily ignore him again when he starts insulting - the main use of ignore list is to be used against insult )
Or you guys can add a rule about it, if anyone evades /ignore by joining with another nick he/she will be muted or gets a warn for it.
Adding that kind of rule will most likely cause more problems. Currently we allow players to use different nicks as they wish. If ever that kind of rule is added, someone can report you/you will be punished if you join with different nick while you are in someone's ignore list as it will be counted as 'evading ignore list by changing nick' according your idea. Dont forget, everyone has their own ignore list and it will be a big mess if we take action based on individual's ignore list.
Basically, the 'ignore list' feature is just part of a small addition to the server and it can easily be managed by players themself, so i dont think management should step in with new rules/punishment. It will create more problem and take away more freedom from players if we do so. The best way for players would be ignore them again, it does not take long to ignore someone, all you need to do is /ignore <player> if he starts insulting you again.
I will lock this topic as it's not a bug and there is nothing to be fixed. You can make new topic in Suggestion Board if you have any other idea( besides the idea you had already posted here ).