I find it disgusting how men don't wash their hands after using the bathroom
That is pretty disgusting. Is it common for men to not wash their hands?
Yes its pretty common.
It's okay to be worried about the hygiene standards of others around you. Have you thought about talking to them and asking how frequently they wash their hands?
They have to wash their hands before eating and after attending the bathroom. I should expose what slobs they are.
That might not be the worst idea. It's unfair to you and others if someone keeps up poor hygiene. You could get sick from being exposed to their germs.