I agree that the number of people on this forum may be insignificant in size compared to the overall naumber of people affected by the DV lottery program (applicants, winners, enthusiasts) but some people may also be on this forum or other similar forums and only read posts and remain silent without posting anything for different reasons.
On the other hand, most people may not be on a forum like this for different reasons, and most people just don't know such forums exist.
You have to be a medium Internet savvy person to find or come across such forums, the kind of person who is a little more inquisitive on the net than the average person (this also depends on where you live, access to Internet, etc) also let's not forget that a considerable number of DV applicants still don't enter their applications themselves without help, many people still rely on relatives, friends, agents to complete their applications. I remember my own experience finding this forum on Google, it was after exploring several other search results containing official reports on the DV program and stuff like that. So, this forum is not hidden but it's also not very difficult to miss on the Internet either.
I agree with your comment about using the radio as a first means of communication, and I think we tend to underestimate how effective radio programs/shows are in reaching a far larger audience than even the Internet does today.
On the issue of people quarreling you for sharing stories (as long as you don't mention names involved in cases) don't pay attention to them, keep sharing such stories because they help educate other people on this forum and as long as you don't have any malicious intention or offensive comments that breach Ts&Cs on this forum, you can say whatever you want, this is the Internet, if people don't like what you say, that's their problem, not yours, as long as your stories are enlightening to many others. On the Internet,you are free to share information.