Nah, this isn't a legal debt that they can forward to a collection agency, as pointed out in the article. They can't legally ding your credit for this (you've paid all your actual outstanding obligations to them), and if they do, I imagine the counterclaims could be significant (reputational damage, monetary losses due to higher interest rates or ineligible loans, etc.).
Now, if this were the "social credit" system of a certain country, well, then maybe they really could blackmail you (because you violated a "social order" by playing ticketing games...).
Now, if this were the "social credit" system of a certain country, well, then maybe they really could blackmail you (because you violated a "social order" by playing ticketing games...).