I just received an e-mail from a very irate fellow in Iceland who thought I sent him a suspicious file attachment and called him a bad name! 
At least he was smart enough not to open the file attachment… said he didn’t trust me! 
From the information he provided (the bad name I supposedly called him) I knew the e-mail in question came from someone infected with the Mabutu worm.
I knew because I have already received several e-mails infected with the same worm, and had read the information provided at http://www.f-secure.com/v-descs/mabutu.shtml
So, just in case any of you might not already know this, I very rarely send e-mail attachments, and I never send e-mail to total strangers and call then bad names! 
Not only was this guy was savvy enough not to open the suspicious file attachment from someone he didn’t know, he also did a web search and found my home page… which contains my name and home address.
Hopefully I convinced him that it wasn’t me who sent the offensive e-mail, but I won’t be opening any suspicious snail mail that might soon arrive from Iceland! 
Gary,
This sort of identity theft—or is it identity borrowing—is very common now. If the person who took offence isn’t aware of that, he or she should be. I get emails, usually with attachments, purporting to be from people I know which obviously aren’t. They can steal an address but not a person’s writing style or known mutual topics of conversation.
I thought by now everybody would be aware of this, would check with the sender before opening unexpected attachments, and would not take offence when spammed, solicited or abused by people they don’t know without first checking.