Conversion might work too. Of course, any suit would probably go after them using as many legal theories as possible. Tortious interference comes into play when

Conversion might work too. Of course, any suit would probably go after them using as many legal theories as possible. Tortious interference comes into play when you are purposely trying to interfere with someone else's business arrangements, either those already existing or those expected to occur. There's a difference between taking someone's site down for non-payment and putting up a statement saying that X Company doesn't pay its bills that X Company has bad morals. Corporate defamation would be another that I would add to the list. Of course, then there's the practical reality of suing a company in Germany from SF.