I was a member of a site where users can share opinions, it was a huge site with very large number of users but suddenly they closed the website. So, I started my own site(s) for the community using Dolphin CMS, Oxwall and others. But people don't like them much and everyone left.
Recently I just started a site using the Q2A CMS and invited some members whom I can still communicate and now they really like it. Everyone said this site is the better alternative. If I had knew this CMS before then I will have more members than now since most are gone and joined other sites.
Now the only problem I got is that there is 'no blocking' option for the private messages and can anyone help us?