So, I stumbled across this question about how to safely watch a solar eclipse, and it got me thinking. An incorrect answer to this question could lead to permanent eye damage, which is a fairly serious problem. Normally answers like that would be weeded out through the downvoting system, since they'd be reviewed by other experts. However, that doesn't apply to Lifehacks, because we're not a site of experts. We're not qualified to determine if whatever tool someone whips up will allow them to safely view a solar eclipse, and being able to quote a website on the internet doesn't make us experts.
The problem all stems from fact that Lifehacks.SE isn't a site which attracts experts, which I've written a fairly length post about here. The short version is that you can't be an expert in Lifehacks, and that Lifehacks.SE is a horizontal site instead of a vertical one. We'll have questions which will either be best answered by an electrician or a doctor, but never by a "Lifehacker", because that's not a thing that exists. Compare that to Drupal Answers, where the topic is well defined: It's about the Drupal CMS, and the experts on that site are Drupal users. They're not going to have answers best answered by a Doctor, because if there was such a question, it would be closed as off-topic. This isn't true on Lifehacks, where a question asking for medical tips would be allowed if the answers are "hacky" enough.
The problem with all this is that it means Lifehacks isn't a site filled with experts. We'll have questions from all kinds of different topics, which are really best answered on other sites and by a professionals in a specific topic. Due to this, the normal Stack Exchange method of "let the votes weed out answers" isn't that reliable. Normally, this wouldn't be a huge problem, some shit answers get upvoted to that top, and the site quality suffers. However, for questions like this one, a wrong answer being upvoted to the top could result in someone actually being harmed.
I believe we have a responsibility to ensure our site doesn't create an environment where users could be harmed by following our advice. For the reasons stated above, we currently have such an environment, and that's not something that will ever change. Due to this, I feel the only responsible thing for us to do is to not allow questions where an answer could harm the asker. It's too great a risk for us to take, and it would be irresponsible for us to continue to take it. This would include solar eclipse question I posted above, medical advice questions, and any other question that could harm the asker.
Remember, the goal of Stack Exchange is to make the internet a better place. Creating an environment which could harm the users of our site makes the internet a more dangerous place, which is the opposite of what we want.
Just stumbled across this answer
Spray the outside of the bottle with any highly volatile compound... Evaporation causes cooling!
You may end up with a toxic or sticky bottle, but it will definitely be colder.
This question wasn't upvoted, luckily, and the answer was obviously intended as a joke (or I hope so). However,instead of downvoting the question and trying to get it deleted, our users asked for more details and suggestions on the kind of materials someone should use. I've since flagged the answer for deletion, but it serves as an example of the kind of thing I'm worried about.