I don't think you can change their opinions nor their way of thinking.  What you have is a very small civilization, online.  A civilization that like all others, has a few that want total control over who has rights and who doesn't. You said it yourself in your post about Scoop and its problems, its very much a clique and those that can persuade do, those who are more mature, honest and very sensitive tend to get criticized.

My two cents worth is that maybe you should just stop trying to convince them.  Generally if you try to convince someone of anything, you tend to have lost them in the beginning.  Some things are better off learned the hard way, let them find out for themselves and let them come back and tell you that later on.

You probably are not working with really mature people in the first place, at least it doesn't tend to look that way.  It isn't that you say anything wrong or that you are saying anything that doesn't make sense, it is just that they want to be in control and not let you say anything.  It is nothing more than that.