I recently read a question because it had such a high downvote score--I wanted to see what was so bad. It did get a few sincere answers, but it also received rather a lot of downvotes. Since the question asked about eating some foods so clearly violating the tenets of paleo, I believe readers considered the user a troll.
So I reviewed the user's other questions, and through this process, realized that at 18, the user was quite young--though not a child--and seemed to live at home, eating food provided by parents. The user was also apparently working very hard to get lean and in shape for military service.
I remember when I was 18. Granted we didn't have the internet back then, so learning about pretty much anything required a focused trip to the library. I was a smart kid, and curious, but also at 18 I was busy with senior year schoolwork, extra curricular activities, and a part-time job, and if I could have gone online and gotten quick answers to specific questions from a community like this, I'm sure I'd have tried. Also, at 18 one is perhaps most strongly (and recently) inculcated with nutrition messages based on USDA recommendations taught in school, without the benefit of much real-world experience to balance it, or time to research it for one's self. I know my own evolving understanding of nutrition and food are the product of many years of research, and unfortunately illness.
Reviewing the user's other questions revealed answers full of assumptions, jargon, terminology that we assume we all know. At 18 I probably didn't even know cows ate grass, nevermind the notion that it's pretty much all they should eat. Pastured? Aren't they all? Polyunsaturated/monounsaturated? Ghee or pastured butter? I knew what butter was, and that it was different from margarine....
I guess I was a bit troubled by all the downvoting, but also recognize that without any context, this seemingly obvious question from a user with a low reputation likely stands out as a troll. I rarely downvote at all, but this made me wonder how many times I carelessly answered questions with references that were jargonish at best and perhaps confusing or harmful at worst, because I didn't understand things about the user, or because of basic knowledge or experience I assumed the person had.
Do you review a user's profile/past questions before answering? How about before downvoting? It seems to me that doing so at least before downvoting might be sensible, just in case there are mitigating factors that might re-contextualize the question such that answering sincerely might really help someone.