One of my best friends collapsed outside a night club and was taken to hospital to find out she had been spiked with a rape drug.
In the hospital she was surrounded by 4 other girls who were spiked with the same drug who had all come from the same place, presumably the same vile person had slipped this into all of their drinks.
Luckily my friend is in a stable condition and is now home and resting but this could have been so much worse!
I hear of these stories far too often and something needs to be done. 
Making it compulsory for lids to be placed on cups in clubs would make it more difficult for people to slip anything into others drinks and will hopefully reduce these cases and make going out a safer place for everyone.