There's no such thing as a submission "request", what you do is "make a suggestion". It seems like a very small difference, but there's a world of attitudinal difference (with a lot less frustration all around.) Because all of us -- editors and suggesters) can start thinking in terms of "improving the website." And all of us can STOP thinking in terms of "who is my servant and how will they serve me, and how can I get more service?"
See, the ODP is no different from any other website. Someone is working on a website (it doesn't matter who or what, it could be a few thousand people working together or it could be one dedicated dude; it could be a General Theory of Everything, or a Historical Description of Ceramic Defenestrable Widgets in the Liturgy of the Turanian Catholic Church from 815 to 817 A.D. Exclusive).
It doesn't matter. You have (1) People working, (2) Workplace.
You suggest an improvement to the way they're working. Now, the person (or people) actually doing the work may think that's a very good idea, or a very bad idea, or an idea that might be worth considering later.
What's going to happen next? Bad suggestions are going to be totally ignored, or -- if the suggestor gets pushy -- brushed off. Unimportant suggestions are going to be left for some convenient time. Good suggestions are going to be considered for actual implementation. And, once in a great while, once in every ten thousand suggestions, a great suggestion is made. And sometimes, a great suggestion will get a response -- because people who can give one great suggestion are worth communicating with; they may have more where that came from!
See, there's nothing really new here. If you've ever in your life made a suggestion you thought was helpful, all of this will be perfectly familiar. (If you've made very many suggestions, you'll have had some of them received with less enthusiasm than they were offered with.)
So that's all there is to the ODP: people review sites; you can offer help; the project can always use good help.