Yes it is not allowed to play while you are Banned.
Sharing accounts is also not allowed.
Game ruin also.
As you can possibly imagine , there is a list of things we dont allow,you can check it out on this page :
http://dota.eurobattle.net/la/forum/index.php/topic,1425.0.html#post_ingameI will remove your ban , because i genuinly belive that you are incredibly unintelligent and was unaware.
Read the list, follow the rules, dont insult Staff members.
Or next time , you are mine.