Try the cell first just to be sure to get him and run up his cell bill. Better yet, text message him incessantly.
For the record, here is the accusation I found in my inbox just today.
From: the scumbag in question and you can try to talk to by calling those two numbers I just gave you
Date: Jan 31, 2008 11:26 AM
quit giving my phoe no. out ...for some one claming to so smart ... you are so stupid .. this is not a thret and there is no need to respond to me outher than to comply with my request..
I love how someone calling me stupid can not spell nor can figure out spell check.