Overheard two girls discussing this at a party last night. Girl A was explaining that current style used by girl B, of cold/bitch-style rejection, could cause bad vibes when used inside a social circle.

Then went on to explain that the trick is to not be defensive at all, but very friendly in a slightly loud way. She even gave examples, like when wrong guy tries to talk to her at a party, to go loudly "HEY ITS YOU!!!" and keep talking loud like that in over-the-top friendly way.

I encounter this shit-test now and then, and also do similar myself, so found it rather amusing!