[macksd]

There are warnings on my bleach bottles saying not to mix with things. But that didn't stop my wife from doing it once. Generally people don't RTFM even if you put it on the bottle in big red letters.

edit: Just to be clear, though, I agree with you - people should educate themselves and the fact that people won't make a point of educating themselves is the problem. I've had multiple experiences where I paused to look up if it was safe to mix medications that were being given to my kids, or if it was safe to use a human first aid ointment on a pet. Sometimes the answer is 'No!' but the general reaction is usually "Oh I wouldn't worry about it".