I try ot try within th spectrum of violence. Sometime I train slow and easy to work on the principles. Other times, with the right training partner, I train much more aggressiveley and effectively. IMHO, the limit of violence depends on the context and the consequences. Training is not sparring, sparring is not fighting, fighting is not combat. The rules of engagaement and intent is very different. Also, what are the consequences if I act and what are the consequences if I don't? Which can I live with the most? These are questions only an individual can answer for themself.
Nicely asked question. Compliments and appreciation.