See... that Senora is talking sense {in the sense that she is agreeing with me, in my initial post, before it all went off on a fugue ).
If this was part of an informal chat and the students were on relaxed terms with their lecturer Dr Shylock and felt able to use their everyday language with her, then it's fine. If, however, they were unable to distinguish between situations when such usage is appropriate and those when it isn't (if they wrote in an essay 'I will discuss the use of metaphor in Hamlet, what Shakespeare wrote after he done Othello') then that would be worrying!
IME, the opposite problem is just as much of a problem. That is, students hypercorrect themselves and end up writing gobbledigook. 'Who'/'Whom' is a key source of this. They think that 'whom' is somehow more 'academic' sounding, so they write things like: 'In this poem the author, whom experienced a strong bond with his city, talks about xyz'. Or they use words that they think sound more intellectual, but end up using them inappropriately.
[Oh, and by the way, I have no idea in what order Shakespeare wrote his tragedies, so don't yell at me if I've got it wrong. I dropped English after A'level!]