I've never run into this before. I just tried to upload a CMS module that WebFTP wouldn't unpack for me, as it said it contained a banned keyword. When I manually loaded the files via FTP client, WebFTP wouldn't acknowledge the files other than to delete them.
I can't find any documentation about keywords, banned or otherwise. There also doesn't seem to be an appropriate support ticket category for contacting DreamHost about this issue. Is there someone out there who can explain this concept to me? I'll be most appreciative.
Let there be snark.