I dont know. I like ot think I do, but people would disagree. if its minor, I'll let it go, but if its something major, then I'll react.
I act as my grandfather and uncle taught me, which is to ante up. If someone does something you do back, but you do back a step up, and if tehy're serious, they'll do back to you on a higher level.
Someone steals a pencil, you steal their book. They steal your ipod or something, you steal their key. The break into your house, you light theirs on fire.
I'll give a specific instance of when I was 15. One of my best friends (who at the time knew the ante up rule) had broken a figurine of my mom's. It was an accident of course, but it was personal to her, and he blamed it on me. I received six weeks of complete and total lock down, where there was no connectiont to the outside world other then school, to the point where my windows were boarded up and my room painted white (Yeah, I had an interesting childhood).
So, knowing that he had a class where the entirety of his grade depended on an end of the year project, I wiped his computer clean of it, wiped all his flash drives, installed a porn virus on his computer that stole any info and reported back to me, while replacing any new page with porn, made his desktop bg porn, and any time he clicked, a woman moaned in a satisfied matter. We (myself and two friends) then sent six of the raunchiest sites we could find to his parents and left him to explain.
the end result was he went to a summer of summer school for the class (it was an english class, you werent allowed to fail and he didnt want to be held back). Afterword, I talked to him and he bowwed out, cause he said he'd have to burn my houes down and I said I'd kill him, and then it just sorta ended cause we both knew that this was going to get ridiculous.
I'll give another specific instance, this time of my uncle (to show that this crazy is hereditary). A guy had run into his car and messed it up,t hen drove off, cause my uncle took a space the guy wanted. So instead of letting police in the district handle it, my unlce drove to the guy's house (because he had an idea of who it was) saw the guy's car (with my uncle's car's paint still on it), and burned it down. like, in his drive way, lit the gas tank up and left it to burn for the guy.
my gradnfather's in his 80s, pushing 90, so I dont really have a for instance with him that I personally saw, but he once told me during the war in the european theatre that after a German had killed his brother, he personally made it his mission to hunt any German he saw and brutally slaughter them during the war, or at least leave them in a mentally retarded state through a technique he's passed to me.
Looking at it now, I guess not, but then again, I think its normal. if someone does something, you do something back thats going to stop them from responding again.
