I would venture to say that if one were to go back to the beginning posts and responses they would find very few "locksmiths" especially back in '92. At least in the US, unless you worked for the defense department, a large bank or were in university (with some very small exceptions like Nyx and a few other experimental servers, you probably weren't on the internet, or at least weren't using nntp news groups. And I am pretty sure FIDO wasn't a viable way in either.)
I can remember lurking back then, and though I thought I remember posting at least once, can't seem to find it in google's archives :) But even back then, you can see that people were pretty careful. It as a b*d to get a copy of the MIT guide. And a royal PITA to get it printed out.
I don't disagree that one should use his own better judgment when replying to most requests for defeating instructions. But I think that is a matter of personal ethics.
Just my $0.02