Earlier quoted context omitted.
I'm not the gp, but i like the look and feel of the site. I also love the idea. I've been using group messages (mms) for this purpose and its been working great. It has the advantage that nobody needs to go to a website or download an extra app, but it has the drawback that sometimes people forget that I started a group message and will use that thread to start a new conversation with someone and people get messages…
Thanks! About the sharing, I am sorry, but I didn't want to claim that it is impossible to share. I will check the phrasing, but the idea is that it doesn't have a sharing feature (like retweeting or the share button on phones). You can't click on a button to forward the content. You still can copy/paste and screenshot normally. It is not built-in, so not encouraged by design.
I can see how I misunderstood. Still it seems like it might be a good compromise and would get me around the issue I described with mms of unintentional sharing. I'm going to see if I can get some of my family and friends to sign up with me.