Should I chase up confidential feedback not being "sanitised" I'm not sure how to phrase the question exactly in the title, but the issue is essentially this. I gave some feedback for a subject I did, which I was told was confidential. The lecturer found out I gave the feedback and approached me about it. From what she said, they were able to piece together who I was from the examples I gave of my concerns.

I realised from their statements that the feedback was given directly to them, but with no names attached (I assume). I don't feel that this was adequately stated in the survey. Now while I no doubt they will be a professional moving forward in this situation, I cannot know for certain that they now hold a vendetta against me. Conversely, they could also inflate my marks to appease me as well. Either circumstance I think we can agree is not favourable.

I have already emailed the university about this some time ago, but never received a reply. The thing I am most concerned about is the lack of clarity about the feedback, I would not have included "incriminating" evidence had I known this was given to the lecturer's directly - though I am unsure if that was an incorrect assumption on my part. 

Anyways, my question is: should I chase this up or should I let it go?
At most institutions in the United States, instructors are given their course evaluations in toto, only stripped of names. It's up to students to not write anything which would lead to deductive disclosure. But there's plausible deniability, so you could have feigned ignorance when she approached you (which was an entirely unprofessional thing to do).

If you are worried about retribution then speak to your chair or at the very least send an email note so that you have a paper record of your concerns.