Here's one I have to deal with a lot: I can't stand adult human beings in the United States who have the ability to shower/bathe every morning before they come to work who do not do so.
There are exemptions to this, of course.
If you work in an office all day and you bathe the night before, fine. If you're a chick, fine, lots of chicks bathe at night, I get it.
But if you're a person who is outside for at least 30 minutes during your day, ESPECIALLY if you live in a hot environment (Mississippi), and you don't wake up and wash your nasty ass in the morning, it should be legal for me to slap the living fuck out of you with no penalty. I mention this, of course, because the dipshit I was talking about on the old board in the "stuff that annyos me" thread is sitting across the office from me, and the whole office literally smells like a freshly dug up corpse.
I just can't imagine why someone would be so lazy or so nasty that they wouldn't jump in a fucking shower for five minutes in the morning. That's all the time it takes to take a decent shower, if you jump in, slap the hot water on, warsh yourself up and warsh your hair, bam, you can be in and out in 5 minutes, 10 minutes tops and you're clean and fresh as a daisy. Inexcusable.