I very much agree with you Michel.

My feeling on this is if you are going to make use of the facilities the community offers IE post images here then there is also an obligation to contribute to the community to make it work in the way that was intended IE  allow and give comments.

For various reasons I have not found myself able to contribute very much to the community recently. However when I do post an image I try my utmost to also go through the gallery reviewing and commenting upon others work. Note this is not the same as reciprocal buddy for buddy comments, I comment where it is justified and where I have something to say. I also comment very sporadically at other times, as and when I can. 

Not allowing comments feels to me as if something is being taken away from the community. It has a hint of elitism, perhaps not intentional, but to me it is there. Someone saying I will post my images but I don't value your comments, or wish to participate in this community. If, as appears to be the case, they are posted simply for an elite circle of friends to pass their comments on by e mail, then why not e mail the image to the friends directly?  

I'll finish by copying in the mission statement from above.

Our mission is to provide an open community where any and all persons interested in photography can share their experiences and knowledge, post their work for review and critique by their peers, and learn new techniques while developing the skills that allow each individual to realize their own unique artistic vision. We do not limit this forum to any one style or form of photography, and we strongly encourage people of all levels and interests to participate.

This mission statement is also at the top of the gallery web pages.

And every one said, 'If we only live,
We too will go to sea in a Sieve,---
To the hills of the Chankly Bore!'
Far and few, far and few, Are the lands where the Jumblies live;
Their heads are green, and their hands are blue, And they went to sea in a Sieve.

Edward Lear
http://www.nonsenselit.org/Lear/ns/jumblies.html