Our (old) house has absolutely no front garden, the door opens onto the street and the pavement runs along the whole width.
Just now, through the nets ( yes, unfashionable, however essential in the circa) I spotted a young woman who had balanced her shop coffee on my windowsill and was busy texting with her nose about six inches from the glass.
WIHBU to pluck the curtain aside and go 'boo!'?