Most daily BART commuters are like me- you try not to touch too many things on BART: the poles, the seat handles, the escalator handles...etc. If you have to touch it, most of us wash our hands immediately once we get into the office, or if you're like me, you carry a bottle of Purell to quickly destroy the germs, and then you follow-up with a thorough rinse once you get to the office.
It always amazes me that there are some people on BART who could care less about germs. Last night, I saw a man (not homeless) lie down on the BART train floors. That wasn't the first time I've seen someone sleep on the train floors. I've also seen people flatten their bodies against the dirty carpet and use their computer bag as a pillow. This morning, I saw a group of passengers come in and just sat down on the ground in a circle. Other times, I've seen people sit down against the door, and start eating their breakfast. I've also watched people play cards while sitting on the stain-filled train carpet.
It makes me cringe to see them pasting their clothes and skin on the floors. But hey, if they're fine with it, why should I worry?
The closest I've ever come to sitting on the train floors is this one time when I was sick with a flu, nauseous, and I literally could not keep myself standing. I didn't sit on the floor but I did bend my knees so I'm squatting. I kept my head down so I wouldn't puke on anyone. I squatted for about 10 minutes....it was a pretty low point in my years of BART riding. But even then, sitting down on the floor is NOT an option.