Coincidental that you should mention them.....
About 11ish am today I had two of them ringing my bell.
As the door release doesn't work, I opened the front window to see who it was, and as soon as one of them started spouting claptrap, I shouted as loud as possible:
"Allah Akbar"...........
All of sudden they didn't seem too interested...
I think they are still running.....