The verdict: Injection attacks (being unconsensually stabbed and dosed with a drug) are extremely improbable at best.
DanceSafe has recently discovered that the BTNX fentanyl strip batch ending in 196 produces false positives with MDMA and meth unless diluted more.
Kink/BDSM can teach us a lot about mutual consent, especially basic things like "what IS mutual consent?". This ain't your grandma's consent class. Unless she's into this.