This seems like something that should be true, but I think I remember seeing a Mythbusters episode where they decided it didn’t make a difference. That show was more about entertainment than science, so I wondered if there was a more rigorous study done? I’ve definitely seen splashes of water(?) come out from flushes so that alone seems to argue for closing lids.
I won’t lie, if you don’t close the lid and I know it, we’ve nothing to ever speak about because that’s disgusting and please stay away from me, I don’t want your toilet aura near me. 💀
I guess your downvoter is pro toilet aura.
They’re lashing out because of the amount of bacteria coating them.