Sportsmanship is a touchy subject. If scores are handled incorrectly, they can become a way to punish an opponent you didn't like or who beat you (sore loser much?) and really mess things up. I've seen it done as a score in addition to the game score, where you would choose from 0 to 3 points to award on sportsmanship, and that factored into tournament score. Never worked out well.
If you want to encourage good sportsmanship, it would probably work best as a check box on the results sheet - check if you felt your opponent was a particularly good sport or extremely fun to play against. It assumes everyone is generally going to be a good sport and give a chance to call out those who went above and beyond while preventing sore losers from using it for revenge. At the end, the player with the most checks (votes) could get the award.
The best strategy would be to always give your opponent a zero. They're all just competing with you, why give them any points? Maybe enough people will be stupid enough to give you the most points?
People will also use these in order to discriminate. I'm sure as hell not giving any filthy Super Dash players a 3.
There are certain players that will power game anything. Me and a friend started doing it for Dixit (his wife was PISSED), look at that dive in the last meter of that race at the Olympics. I played 3 out of 6 Swiss rounds at a regionals and made top 16. Once I was playing Uno with a friend that insisted on some dumb house rule that had reverse cards stacking their multipliers and I saved up a bunch of them and hit her with 16 or 32 cards. She was mad because she didn't think wild cards counted for this. I was insistent on this and she was angry almost to the point of tears and I kept on going because she was being unreasonable and it was funny.
I used to be a friend with someone, and we'd play Smash Brothers together (specifically the Gamecube version). He would constantly berate me for using the C-Stick and spamming certain moves over and over. On Gamecube controllers there are two analog sticks, the second one is yellow and called the C-Stick. Instead of having to do a simple button and first analog stick combination to do your powerful moves, one could simply flick the C-Stick and do them that way. One day I decided to do it continually, make a point of doing it, and started egging my friend on. So he jumped me and his mom had to pull us apart haha.
I have zero respect for fly casuals, you all share this attitude and it's funny to watch you get huffy.
At no Point did you use the term "Hugbox".
I am disappointed.

