You have reasonable examples here, like with bleach. In actual dangerous cases, for example, if an author tells someone to mix 2 chemicals together--and i will not even mention the chemicals as an example--these chemicals can kill someone if breathed in. This is not a "view", it is clearly a malicious direction that is known to cause harm and has clear, concise, indisputable evidence to cause harm. Right?

"How should this community best handle the spreading of views that cause physical harm, and even possible death?"

"Views" (or opinions) do not cause physical harm or possible death. Someone sharing their perspective, their witness on an event, their testimony, etc. also does not cause physical harm or possible death. However, it can cause cognitively dissonant people quite the irritation.

We can all agree that preventing others from seeing another person's message, even if we strongly disagree with the author's "views" or if their views are simply not popular, is purely censorship.

Another example, someone having a hard time accepting an author's testimony and research on the negative consequences of dairy and high protein diets .... well, that's just trolling. It is no different than the Salem witch trials--these people would easily silence people through murder; after all, if you believe you are saving the lives of many others, isn't that "viewed" as beneficial for society as a whole? As for trolling, people are absolutely within the right to express their view :) https://steemit.com/nutrition/@robertgenito/protein-for-muscle-milk-for-bones-and-other-lies-we-believed

So how should "flagging" happen in the real world?

I think a good start is to have flagging on the side of the publishing website itself. This means that steemit.com or busy.org would have the ability to flag and hide unpopular content. This "flagging" behavior would be saved on the website's database end, not on the STEEM blockchain. The STEEM protocol and blockchain itself would not have a "flagging" and reward removal built in. This way, when people get sick and tired of the censorship on steemit.com (FOR EXAMPLE ONLY), they can always "vote" with their opinion by discontinuing to use steemit.com and begin to use a less censored website like busy.org (FOR EXAMPLE ONLY).

DISCLAIMER: I am not accusing steemit.com or busy.org in acts of censorship.