With the sometimes naive idea of aikido magically being able to resolve all conflict, particularly "soft" aikido, I find this statement by Toehi Koichi quite refreshing.
Tohei Koichi: http://www.toitsu.de/texte/tohei_en.htm
You have taught Ki-Aikido to police, FBI, and Secret Service personnel. How did you teach them to calm down or restrain a dangerous person, or someone who is on drugs and out of control?
If a person is dangerous, on drugs and out of control, the only thing to do is forcibly arrest them. They are temporarily out of their mind, so it makes no sense to talk about respecting their human rights. If they are putting others at risk they must be restrained, and then dealt with after they return to their senses.