I have used crossloop for a long time. Simple download, works with mac and windows. From my system as the viewer, I was able to get it to work after some fiddling with it using wine. It makes an outbound connection from the end user, so you don't have to worry about punching a hole in the typical end users router. They also have advertising facets on their website where you can list yourself as a professional in certain areas and people looking for help can connect to you for support that way too (I never bothered to list my services there, so I don't know how well that portion works). http://www.crossloop.com/index.jsp

This analogy is devoid of meaningful congruence. A more correct analogy would be:

a) plead guilty to a crime you didn't commit and go to jail for six months,
b) grovel and beg for forgiveness and go to jail for six years, or
c) plead your innocence, protest the judicial system, and receive "b" by default.

Human decisions are unique in that they can be predicated on something other than fear.