If it's those cup-like urinals that everyone is talking about, it should be pointed out that only men of average height can "hug" them. If you are tall, then you would have to bend your knees to come level with the top of them. So anyone tall is necessarily more exposed.
This reminds me of a time I was in a public restroom. There were three urinals, one about a foot off the ground and two "normal" ones. I'm so tall, my junk starts above the urinal and finishes under the rim, so I really can't hide it, even if I wanted to.
Anyways, a father and son team come in. Dad breaks all etiquette and jumps to the middle urinal. Wanting to be just like dad, JR runs in front of me -cutting me off- to use the other "big boy" urinal. So, I'm presented with two choices, stand there like a creepy mother fucker watching a 6 year old teeter on his tippy toes trying to get his dick over the rim, or stand back a foot from the kid's urinal that ends at my knees and just let it go.
I had to piss, so I stood there with my dick hanging out, aiming down as best I could. Dad shot me a dirty look, but I just blew him off.
In high school, I remember walking up to a urinal and started to piss. A guy I knew came in and started going next to me. He pushed him self so far into the urinal, I told him he better be careful, or he'll fall in. He said, "Whatever, homo, I don't want you looking at my dick!" "Oh... is that what that was? I thought you just had small thumbs. Well, have fun washing all that piss off your shirt."
He looked down at the piss soaked urinal and backed up. I just walked out laughing at him... after, of course, washing my hands.
Personally, I like the dividers. They give me an arm rest and helps me relax for those long pisses. I don't thing my shirt touching a drop of dried piss really has any bearing on my long term health.
Consequently, you ever think of how much splash back winds up in your face/mouth? I had to yawn at the urinal once, and midstream it donned on me that piss splashes everywhere. I don't yawn in bathrooms anymore.