Correct, it will stop serving requests (ignore the rest), but the end result is no different (in fact I imagine this is exactly what's happening). That system is dead to the world. According to Wikipedia in Q3 2009 [1] Skype has over 500 million users (Q1 2009 says 42M active at any time); any super node that is processing a thousand requests and then dies (or only processes one request a second) isn't helping anyone.