This question and this answer are my way of trying to encourage more of this sort of thing.
Posters with sufficient reputation could, as well as being nice, be a little more vigorous in casting down votes for obviously bad questions; casting close votes for closable questions; and in the list of closed non-duplicate questions, either voting to delete, or editing and voting to re-open, each one as appropriate.
And both the undergraduate and research-undergraduate tags are hotbeds of closable, deletable questions: questions about undergraduate study are off-topic here. I have a hunch that the very presence of those tags here is problematic.
There are also plenty of bad questions out there with positive scores. Voting down is as important as voting up, in helping future readers quickly separate the wheat from the chaff.