blend27 - 1:57 pm on Jan 18, 2014 (gmt 0)
So for now I ended up with :
and it seems to stop.
I still see the traffic from Bing image search that has several hundred images from one site in question.
Now if they could only figure out how to interpret HTTP status codes, the nonsense from 131.253.24.* plainclothes bots, they don't seem to get the 403 concept.