The system is working very well, as you can tell by reading the anguished cries of the spammers in the SEO forums. They can't get their spam in; we keep rejecting it. It is a waste of time for both of us, but only they can stop the insanity -- we review every site that is submitted. We, however, can at least tell people to stop. If they don't listen, if they reject the message, if they can't handle reality, if they get all hurt and angry at the truth, that's -- another reality on a planet where rampant selfishness isn't a capital offense.
Our mission here at the FORUM is to educate people in the futility of trying to manipulate "the system", and the equal futility of trying to change the system to one that can be more easily manipulated. The problem is not the system, it is, as always, the people. Each person can choose whether to implement, impede, or ignore the ODP ideal.
The ODP system, therefore, includes features that have historically been found highly effective in harnessing fallible humans to implement a worthy ideal in the face of significant conflicting motives. And we avoid features that have historically been found ineffective or harmful.
Tests? As you may discover by reading the relevant research, the tests you desribe, used by many corporate personnel department, have been proven to do significantly WORSE than random at predicting job performance. They are valuable for protecting incompetant managers from the results of their own idiocy, and provide income for consultants -- but we have no interest in either of those goals, and our humans can demonstrably do better than that.
Communicating with webmasters? Many of us (including myself) occasionally do, in spite of the solemn injunction against doing so. Anyone who has communicated with more than a few dozen webmasters will know from bitter experience why it is usually a mistake. There is nothing we know more angry and vindictive than a rejected spammer. Even in these forums where people know editors moderate, we have vindictive personal attacks. Outside the forums, editors have even been physically stalked. We know very well why the system strongly discourages contact between editors and any webmasters. And, of course, the people most important to avoid are those who are spamming us (that is, the ones who are submitting sites that do not conform to the public guidelines.)
And another aspect of reality (if you are able to face it without hurt feelings) is the vast majority of rejected sites are very blatant violations of the guidelines. They obviously exist only to drive commercial traffic to some other website, and contain no unique content whatsoever. What can you tell people who submit such sites? "You are a spammer. You have demonstrated no ability whatsoever to create unique content, and without that you simply cannot create websites that the ODP would want to list. Please do not submit any more websites." Nothing else you say would be both true and relevant. But how many spammers would take that advice? (which, of course, would be what mattered to us). And (if it mattered at all, which it doesn't to us) in your professional psychological opinion, would that generally make them feel better?