@plastic_sludge
I don't know anything about this killing intent bullshit, but the thing that made all bullies stay away from me throughout middle school was going apeshit on the first one who dared to try and bully me.
Fucker looked down on me because I was a bit fat (168cm tall, 75kg weight). Didn't take into account that by that point I had been doing full contact karate for 3 years. He probabpy thought I would be intimidated by him having a few friends nearby. He thought wrong. So I made an example out of him, going full blitzkrieg. No fancy war cries, no cool posing, no intimidating phrases. I wasn't that kind of calm and collected individual to be able to talk while facing adversity. I just pummeled the little shit without saying a single word.
That was the first week of middle school.
No one dared to mess with me after that.
I have to admit though, I was fortunate to have had the necessary training and his friends not having had much time to intervene before the teachers came to see wtf happened.
If I didn't have the training necessary to demonstrate crushing difference in power to quite a number of spectating students then I would've probably been beaten and subsequently bullied. As far as I have already seen on the Internet (be it manga forums or 9gag and 4chan) most people don't end up being as lucky.
That's why I'm saying that Zaraki's motto "If violence doesn't solve all your problems you're simply not using enough" is quite correct when dealing with bullies. It's just that it needs to be backed up by physical capabilities, otherwise it will just be a pointless tuntrum.