There was a guy working at Tektronix when I was there who had a low paying job and invited some of us to a going away party. I accepted.
Later, I got hired into a new engineering group and my new boss invited some of us over for a backyard barbecue. I had to decline the offer of my new boss.
My family is all from the deep South where a man's handshake is his bond. I'm not a Conservative like those folks nor do I call African-Americans the 'N' word, but I do believe in some of the best cultural traditions and keeping your word is certainly one of them.
Yes, if you've made a grave error, you'll have to change but it must be grave and it must seldom, if ever, happen.