I tried to register on DN but it is invite only. I can understand that but they don't even have a "Contact us" link so I can ask how to get an invite or ask any question for that matter.

I remember reading the HTML Hell page: http://catb.org/esr/html-hell.html It is really annoying when someone (or groups of people) wish to be heard (that is the reason they are on a publicly available site right?) but they don't give a damn about their visitors' opinions.

I can't call a site like that friendly either. Correct me if my point of view is flawed.