It pays to have a counter on site which can tell who, where and from and much more about the hits. This would give your case more weight if you wanted to take it further.
It's a case of do you want hassle or not. If you do you can sue online click here which doesn't cost much. But you will have to pay their costs if you lose. You've maybe got a fifty-fifty chance of winning.
Or you can put it down to experience.