I think you would just need a plugin that checks for the usergroup and redirects to an error page. There is a mod called "Miserable Users" which does something similar - if a user is a member of that group (even if it's just a secondary group), then they have lots of delays and errors when the try to use the site, so that they might believe it is server or network problems. You may just want to use that mod, or if you relaly want a white page you might be able to modify that mod (or at least see how it's done).
|