@engineer,
Quote: One of the cons is that you get people who might express themselves in less than desirables ways or have truly repugnant opinions. That is part of Internet discussion, I'd say an inherent part.
Here on Able2know, the opposite problem is the bigger problem. There is a group of people working to drown out a viewpoints they disagree with. I see no reason that topics like "creationism" is particularly "repugnant".
There are some opinions that I myself consider "repugnant", but "repugnant" should be reserved to a very small number of opinions. I don't support the idea that any idea that a group of people disagree with can be labeled "repugnant" and then shouted out of a public forum.
There are a large number of viewpoints that even when expressed respectfully bring instant personal attacks from the in crowd.