I think the first letter sounds like an urban legend. Of course young people should be cautious about their drinks at a party, but this sounds like a cautionary tale turned into a true story told by a friend of a friend. Sort of like the needles infected with AIDS, headlight-flashing gang rituals, thug under the car who will slash a woman's achilles tendon, etc.

Joanna... I am 50 years old and 5 years ago I was at a club with some friends and someone slipped something into my drink. I had only had 1 drink earlier in the evening and had only sipped about half of the one I got at the club before I started feeling dizzy and "out of it." Fortunately my best friend was paying attention. He noticed these two men, who I had chatted with briefly, were paying a lot of attention to me. They were trying to get me to leave the club with them when he stepped in. My memory of that is still somewhat foggy. I do remember my friend taking me home with him, putting me on his couch and staying awake all night making sure I was OK. I was horribly ill and he did the responsible thing by monitoring me in case I needed to get to the hospital... even though it cost him HIS nights sleep. He called some younger gals he is friends with and described my symptoms to them. They both thought it sounded like a "ruffie" (the date rape drug - GHB). There are NUMEROUS reports (just google it) of people dying after being slipped GHB. I am so grateful that my friend was there that night.... otherwise I don't know what might have happened if those men had succeeded in getting me out of the club and into their car.

Re: Joannakathryn,
You are going to be a victim of some creep with your attitude,it happens more often than is EVER in the press.

When I was young, someone drugged my drink at a local bar. I don't know what it was, but I was very, very sick for 24 hours. Thought I was going to die.
I also worked in an ER where a young mother was brought in whose drink had been drugged. She died, leaving behind 3 little kids.
So I don't doubt that the letter writer, at all.