... and once you've cleared the spam and affiliate sites you have to work through all the sites submitted to the wrong category, sites submitted in the wrong language, duplicate website applications (with an alternative domain name).
Then it's time to check the added value of the website, correct (or reject) the stupid titles and descriptions that people think up (Read the Guidelines !!!!!!).

Many DMOZ editors do not enter into email conversations about rejected websites a. because it's very time consuming, b, because of the abuse hurled by DMOZ-spammers and outrage from the rule-breakers and rule-ignorers.
Just as you don't reply to spam emails (you don't reply to them do you?) a DMOZ editor is unlikely reply to blatently invalid applications.
I have personally been threatened with physical violence by an affiliate website proporting to represent a Christian boys club in NY,NY.

By the way, many editors have in interest in their groups, otherwise they wouldn't be doing the volountary work. There are rules, which are enforced, to prevent mis-use of that interest for commercial purposes. Valid and honest reports of abuse are followed up and action is taken.

Harrassing an editor is a good way to get your website ignored.