Black Hat search engine optimization is defined as unethical techniques that are used to get higher search rankings.
It is not recommended but I am finding people are doing it and being said that it is effective for short term. People use black hat tactics to get instant ranking and traffic for particular time period which is the best for their business. For example people are selling such products which are in demand at the time of Christmas so they might use black hat to get high ranking and traffic for short term to get benefit of Christmas days.
What is your opinion about it?