So we have a big issue of women and men setting down drinks and getting them dosed with some sort of drug. This ends up with robbery, rape or worse. I ran across some interesting stories in the news where technology is being leveraged to combat this. The first story was on Gizmodo and Jezebel via the Daily Mail about some people at NC State Material Science department creating nail polish that detects drugs in drinks.
That is in the future, in the now, LifeHacker has a story about coasters and strips that can detect tainted drinks. Perhaps you should get some.
The House of Void 