While reading some SEO articles I've found out about this very informative SEO Glossary by Aaron Wall . Aaron Wall is the author of SEOBook.com and well respected in many SEO forums because of his search engine tips and observation.
To tell you honestly I've heard of his book and his name long time ago while studying SEO and just before writing this blog, its my first time to read an article from his seobook.com. Just came across to his site from a post on a Webmaster forum.
Also I came across on another Aaron's SEO related website and I found out some interesting issue posted there.
There is a question there that sticks that caught my attention. "Why are You Hating on Directories Aaron?"
Here is one of his views on some of the directory owners
"The problem has come from the fact that there has been an explosion in the number of directories and most of the directory owners are too greedy or lazy to create legitimate business models. If you don't make the site compelling for search algorithms most likely they will aim to find ways to deweight it."
I really like his point of view on directory exploitation. Some of the directories are made for earnings only without considering the quality of the site will be accepted. But you cannot blame it all to the directory owners because some new directories needs some listings and traffic. So if you are the directory owners and you've rejected almost all the links submitted to you because they are MFA sites/low quality sites. Your directory will be put into sandbox by some SEO/Webmaster because you didnt accept their sites. The point here is directory problems cannot be blame to the directory owners only. Because its a two way process to have a succesful directory. Its hard for new directory owners to impose a strict policy on their directory or directory submitter wont submit to your site. Just my 2 cents though.