There is no gray in area in spreading FUD's. It's all black area therefore, it is unethical.
I mean is there a time where spreading a FUD became ethical?

FUD itself is considered unethical, but for me, FUD's is a good thing especially when that FUD really has a great effect on the price of every cryptocurrencies. FUD's = opportunity for us here while for some, FUD is something that they hate.

Overall, people see FUD's differently. There are times that they see it as an ethical way for some reasons and there are some like me who are not. After all, spreading FUD's to the public is a perfect way for the market to be shaken. FUD's for me is a way to remove the weak hands.