Yeah its true, there are some people that abuse the martial arts. Gets a bad name for everyone else. Virtually no one knows that I do it at all, its literally just used for defence if a situation arises. I still turn my back and walk away from fights always unless its unavoidable then I do what has to be done to stop the person from attacking me. Just use necessary force and don't go overboard at all as you can do one heck of alot of damage with Aikido. You tend to find after putting some sort of wristlock on someone or knock them down to the ground they think twice about carrying on as they realise they are going to get really hurt.