vc66,
I don't agree that this site is most valuable for younger engineers. I get a lot of value from it and it's been decades since anyone called me "younger" (in fact my kids claim I'm older than dirt). Even some of the incredibly basic questions that start a discussion can teach us tottering old folks a thing or two as the conversation develops.
Many of us "usual suspects" will look at the posting history of the OP of a new question and if they are just asking and never helping, we either pick at them or ignore them. Some realize that to get answers they have to give them and become useful. The others just get frustrated with the lack of help they get and go away. Both answers are just fine.
What I love about this place is the peer review. When I say something stupid here (a couple of times a day), a half dozen folks chime in pretty quickly with corrections, alternative analysis, or ridicule--all help.
I've rarely seen anyone with the cheek to cite eng-tips.com as the basis for a real world decision. If someone comes here and gets the answer to how to compute the moment of inertia of a sphere, they'll never admit it inside their company. Maybe next time they'll be able to tell someone else how to compute the volume of an earthen berm for a SPCC plan (another very basic question, but one that requires a clear statement of your assumptions).
David