I am a new user, on several stackexchange sites, and perhaps my reactions are less blunted by experience and habits. And I have a little bit of cross-site view. I also visit another site as an amateur, though I try to pay my fee by answering simple questions.
I wonder whether it is appropriate to send someone to another site for asking a questions,if the question is considered close to trash, or easily answered. The right place is wikipedia or other similar sites (or the web) where they will not waste anybody's time and find answers by themselves, which is probably the best service to all, including the author of the question.
Also, I often get a feeling of: "this is not classy enough for us, try the guy next door". I am not saying forwarding, or recommanding another site, should not be done, I only mean it should be careful. It may sometimes be a bit offensive for the other site.
There are highly upvoted answers on this site that are not very theoretical and ignorant of much of the recent (I mean 10 to 20 years) theoretical research in the area. Somehow, I feel this should be an incentive to soften the exclusions.