At a Nevada casino I witnessed a black woman get three triple bars. She went beserk thinking she won $1M. The slot attendant pointed out that the customer did not play the "maximum bet" required to win the jackpot.
The woman went ballistic playing the race card, hater card, getting physical with the attendant and even went as far as to call the machine "racist".
The casinos seem to draw the something for nothing crowd in large numbers.
Same thing happened to me and a friend as we were walking out of the Reno Nugget. We figured what the hell, play the dollar slot. My friend put in a buck, pulled the handle and it hit jackpot. Hell, we were dancing around for close to a minute until we realized the bells and whistles weren't going off. Looked at the payout and you only won the million if you put 3 bucks in. Bummer! I forget what we got, something like $20. Still paid for breakfast!
Yes, we were pissed...but it passed. Lesson learned