Why send anything back at all? Let them scan, find nothing, and move on... you know they're looking for stuff, if they find anything, it's just more incentive f

Why send anything back at all? Let them scan, find nothing, and move on... you know they're looking for stuff, if they find anything, it's just more incentive for them to waste your CPU cycles and bandwidth... if they find nothing, they're more likely to ignore you in the future.