I would agree with you 100% if you truly ignored an explicit request not to write a review. If you have a true UTR, I would question why you wrote a review at all knowing it is a UTR? That would be a dick move. But you don't come off like an irrational person, so I would think that there were no stated rules. Hence, why I questioned, why would you ask for permission to be bound by a rule when there was none? Do they have a website? Do they advertise? If so, I'm not sure why you would think that they are a big secret. They found you...right?
I would also question why people go back to establishments and state "Look at this glowing review I wrote for you?" What is the point in that? To get some extra favorable treatment? What was your motivation in writing the review in the first place? If your motivation was to help others, be at peace with yourself for your good deed. Just don't go back and expect a secondary reward for the charity you already provided (IMHO).
And by the way, if they are under such jeopardy, and a cloud of community suspicion, please stay clear. By the time LE and the community are ready to revoke their standing, your review is nothing but a sheet of paper on a very tall pile. For Venmo to revoke access, the establishment has a three-letter agency problem. It is generally not that deep my friend. Most places that get shut down are for building violations or incorrect licensure, because running a sting on an existing establishment is very costly to the local township. If you are truly worried about this, only go to places that advertise.