I was speaking to a man yesterday who has his own business. He was telling me that the day before a woman came to see him. He gave her twenty-five minutes of her time and then, as would be expected by anyone going to that business, she was given a bill to pay. The lady became extremely angry, livid in fact. Amongst other things she said in her tirade, which was in front of other staff and customers, she said "You'll be sorry. Just you wait. I'm a spiritualist and I will curse you and your family and your business". And with that she paid up and stormed off.
Yesterday, the man called her and left an answering machine message for her to come and collect a refund of her money. Not because it had been wrong to charge her but just because he felt that it was the right thing to do. I commented to him that the Bible says to repay evil with good. I've checked this morning and I don't think it exactly says that at all (oops) but it does say, amongst other things, "Do not be overcome by evil, but overcome evil with good" (Romans 12:21) and "Do not repay evil with evil or insult with insult, but with blessing.." (1 Peter 3:9) which are along the same lines.
I've never given curses any thought. I suppose I couldn't have said whether people still went in for cursing nowadays.
Interestingly enough, my Bible reading portion for today "happened" to include this: "Like a fluttering sparrow or a darting swallow, an undeserved curse does not come to rest" (Proverbs 26:2).