you'll only annoy me by asking me (or telling other ppl to ask me) for exception...
if the system warns you, it tells you to use
/multilog
command which should explain it enough:
Multilogging rule and how not to get banned for it:
Make sure that either both of you are playing (= killing
monsters = gaining exp) or both are AFK (= not killing
monsters = not gaining exp).
If only 1 of you needs to be AFK (= usually stay in town),
then he should quit the game and rejoin later.
You may still get the warning, but you won't get banned
if you follow this.
Also, do not eat any Signet when multilogging since bot
will consider that you leveling a char and can potentially
get you reported and banned.
Usually first account ban is 8-24h, second 48-72h, third
is permanent