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I'd guess this is a single individual with a dynamic IP address.  If he can reset his address by unplugging his dsl or cable modem or forcing a DHCP reset, there is no point to a long term block.  24 hours is probably more than sufficient, by that time he will have moved on to another address.  I gather there are some ""senior"" people working on this (other checkusers, arbcom, etc.) Thatcher "