In your responses to anyone anywhere, I would ask you to remember there is a difference between "I see your struggle and I want to be helpful to you" and "You're doing it wrong and I want to be the one to say that to you" and also a difference in how they will be taken in by others. If you don't know the difference between the two (or don't care), perhaps it would be best for you not to say anything at all.
@scalzi The thing about the latter group is, at least in my experience, there often isn't a point where they suddenly start acting like the former group. Like, it would be one thing if someone's a backseat driver on minor things, but they suddenly get serious when you suffer a major medical emergency.
This is not what tends to happen, in my experience, at least. The person who insists on telling you how you should have cooked your breakfast will also have strong views about having a seizure.