One thing is that the originator of the thread commented on a couple of times is that he thinks he might be a "bad" aikidoka for having these questions. I guess I dont see this, and just that he is being a "curious" aikidoka. Certainly it is stirring a good response.
I hope that I never end up in a situation where I have to test whether my aikido works or not! I hope that by being aware of my circumstances and environment, that I will be able to avoid a physical conflict. I also hope that I can learn to "tenkan" a bit better when presented with a verbal assult (not good at this!). The main thing is to just keep practicing. No good, no bad, just practice.