Although I bow to no woman in my pedantry as regards the English language , I don't really see what's so wrong with those 2 sentences.
The first is the way that so many people talk and, even though it makes you shudder, it's not actually wrong. TBH I was half expecting to read "It's like that fing we was talking about last week when we was discussing somefing to do with history" (my emphases), which is far more common and far more annoying.
The second is bad grammar, but only one instance of it. Nevertheless, it does make me shudder.
I had the proverbial bullied out of me at school for talking 'posh' btw (essentially I had a good vocabulary and refused to dumb down), so I can perhaps see why students might modify their conversation around each other. Which leads me onto one of my biggest bugbears - what's so wrong with being intelligent? Why do children feel they have to hide their intellect or else get picked on? But that's another topic altogether...
Having said that, if they were writing like that in their dissertations, I would definitely take issue with it.