Hi GG,
check this out for example
http://www.ntsb.gov/publictn/2003/ARG0302.pdf
p. 36 I think. Glancing very quickly I had ~45 fatals with foreign objects in flight. Bet you the majority is with wires.
There's also a lot of other similar reports on the NTSB's site.
BTW - enjoying Ray Proutty's book?