Have you ever pulled a "Do I know you?" on someone?

Maybe they're an ex or just someone who's wronged you in the past and one day you two cross paths again and they try to chat you up and such.. Have you ever responded with "Do I know you?"
I have done this before
Vote A
I've never done this before
Vote B
Only with people I genuinely don't remember ever meeting
Vote C
Do I know you?
Vote D
Select age and gender to cast your vote:
GirlGuy
Have you ever pulled a "Do I know you?" on someone?
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