The reason why I'm asking is because I have very few preparable-spells (as I'm only multi-classed into Cleric and have a relatively low Wisdom modifier), and I would like to optimize my spell preparation for 'tomorrow' (when the finals are being held). I'm not sure whether or not a creature making a saving throw like this would alert them to the negative affect, nor whether or not they would know the source (me). I know that Bane is usually used in a combat situation, and that it's not often used in a discrete manner.
Is it likely that they'd react with a 'Hey! That's cheating!' type of thing? Would you expect my competitors to detect/suspect that I would be affecting them negatively? I plan to use Bless to get an upper hand in this competition in the finals, but I'm wondering if I should additionally use Bane against my competitors. The way that the first rounds worked, I made an attack roll every time and the lowest roller was out of the heat. My character will be competing in an accuracy tournament/challenge at a festival - an axe-throwing type thing.