My worst tarot reading was actually a non-reading. I was at a friend's house where a lady (an old friend of the family) was giving Lenormand readings to many. She seemed quite knowledgeable and the sitters were all very impressed. When I asked her whether she could do a reading for me, she looked me up and down and said: No, I can't read for you. And I believe nobody should. Trust me.
Needless to say, I was VERY intrigued, upset AND worried. Since I've joined AT, I've had many great readings from friendly and wonderful people here which comes to prove that this lady didn't really know what she was saying.