Really cool, sure. But I definitely won't be surprised if someone else sort of paints over the QRCode and changes it to another wallets QRCode instead.
Also, I couldn't scan the QRCode with my phone, unfortunately.
Lmfao I wouldn't have thought of that if you didn't bring it up. To be fair though, it's probably the most convenient way to receive tips. It's much better than displaying your bank account number, or setting up a tip jar of sorts, at least. This actually looks like a legitimate use-case lol.
We all know bitcoin transactions can be traced.
Sure, transactions could be traced. So for instance, they traced the bitcoin and the bitcoins ended up on the wallet address 3Justanexamplelolhahahahahahahaxd. What do they do now? They can't sort of contact like the "bitcoin customer service" or something. The person could easily get away if he/she doesn't use centralized wallets like Coinbase.