Whenever you share a link, the username will trigger a notification to them so expect them to come and reply!

There are definitely shared photos across both posts, that cannot be denied. So "travel around together and take their own photos" appears to be dishonest when a photo like the below is used in both posts:

It would be impossible to claim that they both managed to take this photo.

It's a lot of effort, but highlighting indisputable details like this allows no room for argument. Although they will inevitably argue - they always do.