Dragonhelm
Knight of Solamnia
Do you think The Ban List is a good idea for a group or a setting/campaign?
I think that what you include and what you exclude can help to define a setting. Part of Dragonlance's charm is that it doesn't have orcs or lycanthropes. I think psionics can enhance some settings (i.e. Dark Sun) and may not fit others (possibly Dragonlance).
Bans should have good reasoning behind them. Bans on classes beyond the core, for example, might be due to lack of funds to buy all the splat books. Bans on certain character types might be due to the character type being disruptive (i.e. evil characters).
What you should avoid are bans based on forum rumors, heresay, etc. Kender have a bad rep, unfortunately, and that's largely due to a few people who played them as kleptomaniacs who just took the party's stuff and generally disrupted the game. Before you ban a character type based on these rumors, ask around. What you may find is that kender can be great characters to play, especially in the hands of a mature roleplayer.
The key is to find what works for your group. If nobody in the group likes X rule, throw it out. If some people in your group would like to import a new race, such as warforged, then feel free to add them in. Gaming is all about the fun. This should be your guiding light as you decide what to include and what to exclude.