Violence is not common. There are a lot of threats and counter threats, usually over money or dominance, but they seldom end up in any fighting. I wouldn't want to lie to you, there are violent confrontations, but they are usually minor and brief. I have never heard of any use of weapons.
         These two guys weren't actually fighting; they were having a wrestling match. It looked pretty violent, but it wasn't, it was just a macho display.