I enjoy https://wikitrivia.tomjwatson.com/ , a timeline trivia game that sources its data from Wikidata.
Some cards have incorrect or invalid dates on them, and the game creator asks players to complain by commenting on GitHub:
https://github.com/tom-james-watson/wikitrivia/discussions/41
I did so last year.
Which means that, every once in a while, I get an email notification on that thread that reads like someone's coming out of nowhere to correct me about something I never said. Just now: "The guillotine was invented long before 1792."