I use your traq system privately and so have hidden the register page and forced everyone to login, would it be possible for you to provide a options to enable and disable these features in your upcoming 2.0 release?
If so that would be great, I could probably even submit a patch for these features myself once you've released the version 2 but having them by default would be great.
Disable User Registration works, but it's probably best to leave the Login part alone. It's easy enough to remove the link and empty the template.