I'm going to hold my nose next to a stinky stranger on the bus
Why would you hold your nose in front of him?
I'm tired of smelling other people's BO, and they need to be called out.
Other people's BO is terrible, but embarrassing them by making a show of holding your nose is not the right thing. It will just make yourself look like a jerk. You should be tactful if you address it at all.
What's the big deal. They need to be called out on this.
I understand that they are in the wrong, but you should just move to the other side of the bus to avoid this person's stench.