here are some reasons why 2go banned accounts.

1. 2go don't like accounts that uses abusive words, words that doesn't sound right.

2. 2go banned accounts that are reported by members.
Most people just join a 2go room and start abusing several people, unknow to the 2go user, other users might also have report his account to 2go, and it the users number count are much, the account will be banned.

Here is the direct message from 2go.

2go takes abusive behaviour very seriously to protect its users and provide a positive chat environment. Please read the 2go Room rules when entering chatrooms.
The 2go moderators are carefully chosen and trained to be fair.
All bans are reviewed to ensure they are unbiased.
If you still feel you were unfairly banned, then don't hesitate to Report to us.
CLICK HERE TO REPORT YOUR ACCOUNT ISSUE TO 2GO.