Giving someone a good, hard ass kicking has worked for me, it's gotten people to stay permanently off my back.

However! It has also initiated constantly-escalating near-wars with groups of people showing up at my home with weapons. (I was a teenager. I felt invincible. I grew up.)

Some people will back down if you fight back. Some people will just fight harder.

So, while violence IS a solution, you also have to know WHEN it is a solution, sometimes it is. Sometimes, you're playing a game with terribly high stakes and no jackpot. Sometimes, it's better to walk away.

I used to think I never lost a fight because I was spectacular. Actually, I was just spectacularly lucky. I could be dead right now.