I have to admit it... I once asked for the lottery numbers myself. Not that I could interpret the cards as such ofcouse, nor did I win the lottery... But I just wanted to see what happened.
I suppose the daftest question was one concerning the weather... I mean, how can I interpret any card to predict the weather? Sure in hindsight it is very easy, but for instance the tower could mean anything from thunder to an unexpected sunny breakthrough.
I was once in a train on a very stormy day. While I was shuffling my deck someone ask if I could pull a card to see if the weather was going to clear up. I pulled the four of swords, which at the time I took to meaning the storm would lie down... At the end of the day my interpretation had changed dramatically when the storm did not lie down, but got worse and worse. It got so bad that the train got stuck and we were stranded.. I guess being stranded is an other explanation of the four of swords but I will never do a weather forcast using the tarot again!