My dog is vicious to the uninvited guest, lavishly affectionate to the invited one, and so freakishly acute that he has mastered the English language.
When the flower blooms, the bees come uninvited.
I've had fans come and knock on my door. I'm usually polite, but I'm usually very direct and say, 'It's not cool that you come here uninvited.'
When executing advertising, it's best to think of yourself as an uninvited guest in the living room of a prospect who has the magical power to make you disappear instantly.