I've seen this couple of times in the Nest.
Rather than easy fix, this I find like a long-time "problem". If I can at all call it problem.
People feel more comfortable to chat (and help) with familiar names in the Nest.
In a way it is important how the question it's stated in the first place.
Myself I don't have problem answering any question (if I know the answer), to anyone.
The problem increased at more complex questions (as stated above), but just because those answers can't be easily Googled.
In any way, I still think Nest is great source of informations, but true those who will only interact with others when they need help, won't have as great success (IMO).
Try to ask questions politely (please and Thank you do the charm), plus for some more complex answers you might have to work the answer by yourself, but in most cases you can see conversation developing in Nest.
If you however see any kind of discrimination (not that I have...) feel free to contact any of the ranks in-game