Invite someone that set presence offline

Invite someone that set presence offline

do u ever have experience like that? u have set presence offline but u always invited in a group chat by someone, u have block that person too but u have invited again.

u want to try this trick? here it is :
1. use 1 nick with 2 contact list. login with nick that u want to use the contact list (nick A), when appear 'downloading contact list' press the back button, then login with nick that u want to use to invite someone
2. create group chat as many as possible
3. each time someone left your group chat, invite again, again, again and again
4. when he/she set presence offline, in ur contact list he/she still online because lock with nick A when first login
5. invite the target when he/she still on (not log out)
HAHAHA