Who is at the door?

Doormat: A reliable, all weather product, there to wipe feet on. It takes the trace of the outside world from shoes. It sits between the inside and the outside of the home, welcoming people in and welcoming people out. One typically walks all over the doormat.

Exploring iconography and the Blah Blah Blah towel
Blah Blah Blah: speaking nonsense, words falling between the cracks, not worth listening to, muddled, illegible, on and on and on, white noise.

What happens when Blah Blah Blah meets doormat?