Black Hat SEO is not good for websites. You may benefit in the beginning, but ultimately your website will be pulled down or even black listed. Black Har does not work for long term. However, what if I use Black Hat for short term gain. Let say, I have a website that I plan to use only for 6 months (website centered around certain event). If I use black hat I can rank just in one month, but if I use white hat it may take six months. Is there a point in using white what if my website will last only for six months?