Thanks. I modified my htaccess yesterday. It had about 700 IP addresses listed in it.
I found this site
http://perishablepress.com/5g-blacklist-2013/and I liked the idea of targeting user-agent. This DOES seem more powerful.... but..... after about 5 hours I had to pull it. Something caused my site to crash -- again --.
So now I'm back to the original listing.... and I've added 5 more IP's to it... (including BING).
The fight goes on. :-)