There a few misconceptions:

1. Lacing cocaine weed won't kill you. Infact, it won't do much. You are simply wasting it, because the only way you are going to half-away high off coke is to freebase it, but you might as well get crack, since it would be more efficient.

2. PCP is mostly dangerous if you are handling the powder form, and how one mindset is. Most people die from it from snorting it, which is practically suicide. Some bud laced with PCP in a diluted liquid form isn't going to kill you. Even then, they rarely would do it. I did once get a bag of weed laced with PCP without my knowledge, but the weed was shitty anyway, so I thanked the guy for doing it. Never happened again. It's rare to get free drugs when making purchases.