I know there are some opportunists that are editors, and to some degree there are checks and balances, but I believe certain Metas pretty much do whatever they want. Some of these can be justified, so please don't think I am saying these are not supposed to be there (judge for yourself). Here is a listing of the domains with the most listings in DMOZ:

http://www.whois.sc/internet-statist...-listings.html

If you look, I think you will find some real winners (sarcastic tone of course).