Why must people break wind on the bus?

Oh please like people need to fall behind the excuse of a "medical condition" to fart or burp? Come on, what medical condition is this? "Farti-tis? Belch-aphoria? Those things are pretty disgusting, but it is the public and they feel it is the perfect crime. What really gets me in a pinch is when I am out to lunch or dinner and then someone opens a snot rag and BLOWS THEIR NOSE, and it is loud and disgusting, then they LOOK AT IT!!!!! Yeah, that is a medical condition too, but for goodness sakes, wait until you get to the bathroom. What if I have a medical condition that does not allow me to "lighten up"?