Is fun gonna Kill me someday ??

I am one of those rare breed who seek to find something funny in everything in this world. Things have gone up to such limits that even when i think i will punish someone, i make fun of him !! I mean i become quite sarcastic !!
I can't understand where to draw the thin line. Its really tough for me. I think if i make fun of that person , then he might accept his fault in a sporting manner and consequently try to rectify himself. I am so ignorant !!
I mean to do no harm to anyone by being sarcastic. Its my nature that pegs me on. I even laugh over my own mistakes and try to rectify them.
I understand , that sometimes my sense of humour can be a big pain in the ass, but I can't help it. I am like that and shall remain like that. You have to bear with me. :))
I hope people can enjoy my jokes to the same degree that i enjoy while cracking them ...he he he he he he...