Knowing Aiki or expressing it is one thing... Your intentions are something else. In Aikido I would like to think we train ourselves to commit a minimal amount of "harm" by polishing our intentions...
As Shoji Nishio put it....
"People who practice Aikido should be recognized as the best artists in the world. It's easy to create something good with good materials, however, we perform a martial art that is designed to destroy and kill people, which, is something people dislike.
With these poor materials, we cultivate a society of friendship and build peaceful minds that people desire.
Every Aikido technique has that mind/heart"
Thanks, William. I appreciate the sentiment. However, let's respect Jun's wishes and keep the discussion to Non-Aikido Martial Traditions. We're specifically examining the extent to which the 'aiki' skillset provides a technical basis for actual success in preventing harm. I take it for granted that no-one in these discussions *wants* to cause gratuitous harm.