>All of DMOZ data would be in some RDBMS
Yes, well, a couple of issues with that:
Ah, having worked in databases, I have fewer illusions about the magic of RDBMS. The fact is, it really doesn't matter (from a performance perspective) whether a database is relational or not. Underneath the hood, it's indexed or hierarchically linked. Putting an "afterburner" switch on a Geo dashboard doesn't give it a passing gear. And -- these databases are HUGE. Tens of billions, maybe hundreds of billions, of records: not indexed for the purpose you propose. The ODP doesn't have that kind of server horsepower, and if it did, there would be better things to do with it.
The other issue is: you say a lot about YOU being a legitimate webmaster. And that may be true. But look around you at the submitters of the NEXT nine submitters. If you're the non-spammer, every one of them are spammers. And ... if you're the non-spammer, then everything you do -- each of them does ten or a hundred times. Because, remember, they are spammers, that's what they do professionally! The "little load" you'd impose on us gets magnified multiple orders of magnitude, as all those spammers try to hide in your shadow, taking advantage of whatever sympathy we have for you, sucking up whatever resources we'd be willing to give. And you know, the fact is, for about 90% of the submittals, we want to not give a status. We want those spammers frustrated at not being able to tell which brick wall they are knocking their heads against.
Suppose we try to tell the difference between you and the spammers? We can do that, you know. We just review the website. And at that point, ... if the website is rejected, the submitter is a spammer.
So before the website is reviewed, we don't know whether to give a status or not. After it's reviewed, either EVERYONE sees the status (i.e. it's accepted) or we don't want to give a status (i.e. it's rejected.)
That's life on the internet.
And, of course, it still begs the question. What practical use is there? For a non-spammer, I mean: I know the spammers need this information desperately, to be able to figure out how to make that NEXT submittal even more deviously deceptive. But what are the non-spammers going to do with it?
Nothing. It is undisputed (and, I believe, undisputable) that there is no practical use for that information.