[markkanof]

It's not really the same as someone knocking on my door. It's much less intrusive and it's something I can deal with on my own time.

When someone knocks on my door it's usually around dinner time, and just because of my general demographics it's probably also not likely to be something I am interested in. I have no interest in buying cleaning products (and giving my credit card information) from some random person who walked up to my house.

I do however have an interest in new clothing styles from a store I shop at frequently or as in Patrick's example new learning materials he is putting out. Also, email can be dealt with when I am ready to deal with it and it's pretty easy to just click delete, delete, delete. I personally find it much harder to turn away (although I will do it) a desperate looking person standing on my doorstep.