I suggest DP Staff to report banned people and the reason they've been banned for so that we can know whose doing bad things and what's forbidden here .....etc
Hmmm... I don't think they'd do this.. you can already see who's banned at the moment, but there is no "wall of shame" that the banned usernames are kept in.
The staff here on DP, BAN a big no. of users everyday. Most are due to infractions. Many of the times, the ban is self explanatory either because you know what you did wrong or the infractions provide a short reason. There is no need for others to know who has been and why. And as 8everything said, there is no "wall of shame" of banned members on DP and never should one exist. And FYI the staff here isn't paid so I don't think they would want to waste their precious time in writing reports about why was a member banned. They have a life to live!