As an expert Uno player it’s really annoying when my cousin invites me to a friendly match and out of nowhere starts swap handing the shit out of me. There’s a Wikipedia article about the rules, and it specifically states that swap handing is not official, and I have to show that to her every fucking time ’cause she doesn’t believe me.

I personally believe that swap handing is a fun way to play casually, due to the fact that matches usually go faster because of it. But if you are playing for money, I recommend using the official rules because they tend to be more fair if you have a good strategy.