You won’t. You can’t. I used to do sales, and was so good at it that I ended up running my own marketing company. (Eventually I became soul-sick from swallowing so much evil and darkness and had to spend an entire year homeless to sick it all up and save myself.) But one of the things we were taught in sales is that the vast majority of people can’t force themselves to deny you.
An example of this is phone sales. We were trained never to give up, ever. No matter how many times they said no, no matter how many times they said good-bye or not interested, we had to simply continue as if they’d said nothing. It’s called “assume the sale” in marketing, and is a very traditional high-pressure tactic. It relies on the fact that most people have been so conditioned to surface politeness that they just cannot bring themselves to rudely hang up or slam the door in your face while you’re talking at them. I had occasions where people wept after being on the phone for 30 minutes or more, begging to go, but just could not hang up the phone. They’d eventually break down and buy something just to escape.
They’re relying on the same effect happening with you, and with good reason. Sure, a small handful of sociopaths and narcissists will be able to laugh it off, pocket their dinner, and walk away whistling without a second thought. Those are anticipated losses and already baked into their estimated costs. The vast majority of people simply won’t be able to screw them over and walk away, no matter how much they’d like to or want to or even plan to.
The limbic brain is a bitch sometimes.