Do you believe in Curses?

I walked into my room today, and as usual, they were arguing. Today's argument was about curses, all kinds of curses. I personally think we all should reject curses when they are uttered against us. Take it back to the sender, yes o, I am Nigerian and I believe if you don't send it back, it will grab you kakaraka! (That means tightly) lol. I mean, even the prophets of old broke curses abi. Do you believe in curses or are you untouchable?