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 I'm always glad you post these kinds of things (first one I've seen here, but I remember seeing them more on birdsite) -- it's good advice, a good reminder, _and_ I get to look though the replies and pre-emptively block people who really don't get the point!