Okay, disregarding the whole bribery thing (because I just responded to it in another thread), here's a response to your original post:
Writing such an email would be a waste of your time; not because the editor wouldn't answer (they are encouraged not to, but many do anyway, as you say out of the goodness of their hearts) but for two other reasons. First, you can't know which editor would review your site. There's a number of editors who can edit in any given category and nobody can know in advance which of all these editors will be the one to look at your particular site suggestion. Second, the relevant thing is the category, not the editor. Yes, editors are human and sometimes make mistakes when judging where a site should go, but you can't make the assumption that this will happen - you need to suggest your site to the one best category for it to decrease the time until review. Oh, and also (three. Three reasons!) if you were to write an editor and get a response, chances are s/he would just send you to R-Z anyway.