Even when safety guidelines and regulations are in place, the rate of chemicals acceptable by law may be far higher than what is genuinely safe.
I think there is something about a good person doing bad things for what they consider to be a good reason. Then the battle is on to almost prove to the audience that it's justified. How far can you go with that? How far can that character go before people won't accept it? Trying to walk to edge of that line is a challenge.
We always take acceptable risks in our society.
We're the acceptable edge of the unacceptable stuff.
There has to be a common sense cutoff for craziness, and when that threshold is exceeded, then the criteria for publication should get far, far more stringent.
As a matter of fact, personally I am ok with exposing, as long as it is done in good taste.
As a group of players, and as a set-up, you need to set your stall out as to what is acceptable and what is not.
Concerning PDA: Anything that can be described as 'cute' is okay. Anything that can be described as 'mating' is not okay.