Topic awaiting preservation: Configuring TinyDNS as authoritative nameserver for all domains pointed at it

I am working on some web applications that allow users to host their own websites, at their own domain names.
I am using tinydns, and currently need to manually add each new domain to my data file when users want to set up their sites.

Instead of writing a system to automate this process, is there any reason I can't just eliminate it?

To be more specific, is it possible for me to set up my dns server to represent itself as the authoritative server for all the domains that are pointed at it?
My first attempt at this took all my sites offline for a couple minutes, so I thought it would be smarter to discuss solutions before continuing to just try things

Thanks,

-Aubrey