Looks like one of those assa a-xx high security commercial keys

I thought the same

It would be easier to steal keys off of someone’s desk or just pick the lock over stalking someone online, verifying you know their location irl, decoding a key from a picture, and then using that key at their work(?). Possible, but highly improbable. Like, if a YT streamer showed their house key and their address was public enough, yeah, that’s a risk. Some rando on Lemmy? Not so much