If your profile reads to the affect of, “If we don’t respond, take it as our polite way of saying we’re not interested”, you’re an impolite dick. Let’s break this down. This is the equivalent of passing a stranger on the street who says, “Hello, you look beautiful in that dress”, and you pretend not to hear them even though you both know you did. Who does that?! At a minimum, human decency dictates a simple acknowledgement.