+1 to update your EULA and ToS. Specifically mention that one cannot use the service with the intent to reverse engineer it or build competing services. Both th

+1 to update your EULA and ToS. Specifically mention that one cannot use the service with the intent to reverse engineer it or build competing services. Both these are standard in most online services like Google APIs etc. Google for example, asks that if someone publishes metrics comparing Google API performance with others then they must share information about the performance testing with Google (test data, test methodology etc.). On the other hand, remember that its perfectly legal for your competitors to gather publicly available information about your service. Good thing is other party is not hiding themselves so maybe they are playing fair. Btw your neighbor visited your home so be polite and visit them too :)