True, that's a big disadvantage for them. They have no idea who they sued. According to court papers, they hired private investigators to find out my identity. As expected those investigators failed to find anything. Going into a lawsuit completely blind is beyond stupid, especially when your claim is very weak.

Another disadvantage for them is the publicity this case is attracting. If he wins this case, he is legally recognized as Satoshi Nakamoto, the inventor of Bitcoin. He's asserting he has "database rights" to the Bitcoin ledger. He asserts he owns the "Bitcoin" name. He'll inevitably claim the Satoshi coins. This is why he fights so hard to get a court to declare him as Satoshi, so he can begin enforcing these claims against exchanges, wallets, developers, etc. Obviously he will lose, but I suppose he's deluded himself and his followers into believing this is a viable strategy to take BSV to the moon. But there are just too many eyes on this, and too much money in this space to allow someone like him to even have the chance to legally assume the Satoshi moniker and associated intellectual property. The best intellectual property law firm in the UK is actively working on this whitepaper issue. He is outgunned legally.