2 for Germany, one for Switzerland. Sounds european but proxies can change all that logic. A step by step test is required then which I haven't run.

If you feel so strongly about it, then ban that address. You can do that in your filters. It may well be a dynamic address, which means next week that user may have a different address. Perhaps totally different if via proxy. But then some sucker who adopts that address in turn finds they can't connect to many hosts because the ip they adopted for the week or few days is banned by many hosts. It's not as simple as it 1st seems.