Why can't people talk about their bans?

The forums were designed for players to come together and have a place to discuss game related topics in a civil and constructive manner. Discussing in-game or forum account actions, however, are not considered game related topics and are meant to remain private. Hence the Code of Conduct guideline:

http://us.battle.net/en/community/conduct#discipline

Discussing Disciplinary Actions
This category includes:

Creating posts or threads to discuss disciplinary actions taken against a player, including chat logs and email correspondence between a player and a Game Master (GM)

Creating posts or threads to discuss disciplinary actions taken against a character or account on the forums

If a player is found to have participated in such actions, he/she will:

Be given a temporary ban from the forums, depending upon severity

Each department has it’s own channels that you can use to express comments or concerns:

Forums: wowreportedpost@blizzard.com

GMs: WoWGM@blizzard.com

well, that makes sense. It just seemed odd that there's a gag order on these things. I guess I just think that some players might use the opportunity to show where they messed up socially so that others would learn from their bad behaviour, but I can see that it would really get the trolls roaring as well.

Thanks for the good answers :)

We all make misteaks, I know I have. =) Oops!