Re: Cursing for what ?! Sawaab ?
Hmm...makes sense. I understand your point. And I am thankful that you brought it here. But still, we don't have any example where the prophet (saw) himself specifically cursed anyone in his life. Hence, this "cursing" might be allowed but not a very lovable and noble act in front of Allah (swt) (if done by humans). Because, if it were so, the prophet (saw) would have done it many times in his life, as the prophet (saw) don't let go even a single opportunity of pleasing Allah (swt).
It might not be a sin, but it indeed doesn't deserve as much of practice as some people do in present times, few of them even do so much that it gives an impression that they are convinced to gain pleasure and sawab from doing it with such a passion of hatred. The prophet (saw) taught us to love and pray for even the worst enemies of Islam.
Let us leave alone those who have died and serve our lives for those who are alive and in need of our help.
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I am sure that if I am busy in cursing people while at the same time in place of this act, I could have done something more useful and beneficial for ummah but neglected it, I would be held answerable for that on the day of judgement. Cursing doesn't benefit anyone, praying does!
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May Allah (s.w.t) guide us all towards the right path.