OK, let me give an example.
I have one client who sent us a template to work from. It had the text issue and the ctb issue we were talking about. The ctb we can live with, the drawings just plot a bit odd because we don't have his lineweights. BUT, as we had no sample drawings, just the lone template, and his standard text style.. well wasn't, we did not know it was not working correctly. The font he actually used was wider then our fontalt. So all our text in revision clouds and such bled over if you had the right text font. They never mention that the text is not right when checking the drawings we sent.
One or two jobs go by with them getting dwf files and thats fine. Next job comes up and they are making the countertops in house so they want cad files instead. Well when they plot the drawings, since they HAVE the font, it comes out all messed up.
Is it a strange set of circumstances, yes very. Is it the only time things like that have happened, nope, not at all.