Online scams! Tell me your experience

I used to hear a lot from people that one can earn money through Internet.When I started,I really did not have much idea about online money making.Finally after a lot of work,I have earned money from Internet,but I had to go through a lot of obstacles and one of these are sure to be:- online scams.There may not be a single online money maker who has not encountered with a money making scam.Feel free to share your experience here.