I also have had similar experiences. The number of occurances lessened somewhat after I started including my name on my
answering machine message, but I still get a fair share of non-paying-attention
wrong number calls. Not only do I get calls for Jason, the guy who had my
phone number at the
fraternity before I did, I also get calls for Corey, who lived in the same room I did--
but with a different phone number. Those always
baffle me.
A large portion of these wrong-number calls are from
telemarketers--they usually have you
on hold until your message ends, thus missing your message and the point entirely.