For example, you wouldn't want someone signing up with 'support' or 'admin' as username, right? That would mean they would be able to generate a URL like http://example.com/support or http://support.example.com.
I'm planning on consolidating this list into one single huge database that all startups can benefit from. Hence, as a humble request, I kindly ask you to donate me your list so we can put everything in one place, together!
You can contribute via Github: https://github.com/dsignr/Disallowed-usernames
Let's get this list up so everyone of us can benefit from it. Thanks!
Neya