When looking at online forums, audience participation is a necessity if you want to elicit healthy discussion and debate. I think that one forum where strong audience participation creates very interesting things to read is AskReddit.
AskReddit is part of the networking forum site, Reddit. On Reddit people submit posts that contain videos, pictures, text, gifs, and other online media. On AskReddit, users submit interesting questions, and then other users comment on them. The questions can be funny, serious, happy, sad, sexual, topical…basically whatever seems interesting. An AskReddit question is fun to read because of the responses that the audience gives to a certain question. Because of this, audience participation is vital to keeping the forum interesting and keeping users coming back to contribute again and again, both by asking questions, and by answering them.
There can be very lighthearted AskReddit posts, like this one:
There are also incredibly serious questions, like this:
There are tons of other interesting threads on AskReddit, and the great thing is the users can comment on each story so there is lots of discussion surrounded thing questions being asked. The forum is very accessible. All you have to do is sign up for an account on Reddit, and start asking your own questions!