ive used it on HBs that i dont know it is very effective in getting them to approach you and the higher the opinion the girl has of herself the more being ignored gets too her.
ive noticed that if you dont look at her at all while all the twits are surrounding her and behaving like performing monkeys she will make some excuse to talk to you--it wont be immediate sometimes a few days but she will approach.
once she approaches---you have to make her want to come back again.
once she has approached you cant go back and start ignoring her again---so push pull is not an option with ignoring.
If you speak one day, snub next time, say hi after that--she will write you off as a weirdo--i know this from experience.
but it is a great way of making her approach you initially