Just that, really! I thought it would be a fun thread to ask about petty things you've done just because you can. I want to hear about your parking fares paid with 1p pieces!
I'll start: I had an ex who was (when I looked back after the relationship ending) emotionally abusive, sexually coercive, and generally awful. Years after we broke up, he self published the book he'd been working on whilst we'd been together. It was a dystopian novel which revolved around a huge corporation doing some terrible things, and when I googled the name of the book to be nosey, I found that a real corporation with that name DID EXIST in Brazil. I may or may not have sent an email to make them aware of such defamation and gone to the effort to have Google translated it into Portuguese 