But when games are unbalanced I will intentionally throw things a bit. This mainly manifests itself in volleyball games where the teams are constructed in an unbalanced way. I set, so if I think our team is too strong, I’ll set the weaker players more than the stronger players.
It isn’t so much intentionally losing as much as optimizing fun.
For non-competitive people, cheating is wrong because it is selfish, not because it’s unfair. Throwing a game is okay because it is altruistic, not because it’s fair.
There are situations where I even think playing your best is wrong. For example, when you are thoroughly beating someone, and you know they are upset about it, I feel that continuing to push hard is rubbing it in their face. They already know they aren’t good enough to beat you.
In this case, though, I don’t see a problem playing either way. It’s not lying to not play your best if you haven’t agreed ahead of time to play your best (i.e. what Tripolar said).
There’s always a balance between competitiveness and etiquette, between fair play and a fair fight. It’s just that competitive people draw the line differently than non-competitive people. A 100% competitive person is a dick, but a 100% non-competitive person is no fun to play with.