You can't be serious.. O.o I rather not have my Lum berries wasted on confuse ray tbh. Even so, I feel the chance is far greater than 50/50. If it is indeed 50/50 the code needs to be looked at because I've never tossed a coin and got heads 8 times in a row.
In all honesty I use sableye on my team in Showdown,pro,other games and pranksters are a very very big part of pvp. Also on your ratio being 50/50 I went a game where 8/8 times I confused someone they never hit themselves in confusion. Some games it could be 8/8 that they will hit themselves..... its 50/50 i just all luck tbh. I love pranksters also not all of them are based off confusion ex.volbeat is based off its encore par and baton passing.