Heh, seems like there's allot of people commenting about Lazy...
Normally, I would walk away and take no notice, but you have been positively horrid. I understand that there may be something we don't now, but there is no excuse for what you have done, and the damage you have dealt is extremely large. I will not tell you to "Kill yourself", or to "Rot in hell", but will formally and pleasantly ask you to stop. The feelings that people get from bullying and harassment are not nice, speaking from experience.
So don't carry on doing what you are doing - You know it's wrong, and I'm sure you're better than this.