Leaving negative feedback for them isn't going to stop them. They could have a feedback score of 10% and be allowed to continue scamming people. If you add them to your ""follow", of which you appear to currently have none, then we can see who they are. If we all report them, there is more chance that eBay will listen.

If you're not sure how to follow them, go to their feedback page and then click on their ID at the top. On the next page will be a big blue follow button under their ID. Hit that and then we can see who they are. As it is, it's pointless showing screenshots of an anonymous ID because there is nothing we can do about it.