> Depend on it to do /what/ though? My specific worry is that some "firewalls" will try to use the little that's still visible (the spin bit, packet sizes, pac

> Depend on it to do /what/ though? My specific worry is that some "firewalls" will try to use the little that's still visible (the spin bit, packet sizes, packet timing, etc) to try to guess whether the connection comes from a "legitimate" source like a common web browser, and discard the packets otherwise. "You flipped the bit when you should have flopped it, so you're a malware and I'm going to blackhole your whole IP address for the rest of the day", things like that.