You are right on target with that advice, @calaber24p. The younger me wouldn't have agreed with that recommendation or even with myself today.
Oh, I forgot to mention that sometimes people can change after a while but it's only a very few. The ones that do turn usually I find that the things they've done to hurt others or whatever the situation maybe is when they were pretty young. The younger a person is, the higher chance they have of growing and becoming a different and better person.
I do find that keeping a constant reminder of how people are even if they have changed helps prevent the chances of history repeating itself...