I, Niekolaas, was once friends with Sepukku.. I even invited him in my LS, until an event had occured (Side Note: I do not want the event said since it is a matter of LS Privacy, and, if said, I will do whatever I can to see that a punishment is done), and, due to LS rules (Very basic.. No flaming others..) was broken, he had called the person a ***, he was booted from LS.. After that, he immediately sent me a /tell and called me a *****.. Without even asking what had happened, or why he was booted.. After that, he followed the people around, spamming shouts and flaming them in game.. Now, if you find someone as childish as this a friend, then you obviously have not got him mad even the slightest.. Rules are rules, and they were broken, and now he hates me, but I will not tolerate someone such as that...
~Niekolaas
PS: As said by others, people are people.. In game or out.. So treat them as you would want to be treated...