*Shaykh Ibn Baaz (may Allah have mercy on him) said:*
*One of the gravest of crimes is issuing fatwas without knowledge; how many have gone astray and been doomed as a result of that, especially if the fatwa was utter in front of many people and came from one by whom some people were deceived.* The dangers posed by that are great, and the consequences are severe. The one who issues fatwas without knowledge will bear a burden of sin like that of those who follow him.
_End quote from Majmoo‘ Fataawa Ibn Baaz (3/219)._