mess making
As far as unsanitary goes, yes, fecal matter is unsanitary. What the others said about a UTI should be considered for any long term sitting around. Never had a problem with this myself, but I could have just dodged the bullet too.
Diaper rash - had one incident that I felt like I wiped my bottom with poison ivy. It itched to bad. That, BTW, happened even though I cleaned up pretty quickly. Could be something I ate too since it was unusual in my experience.
Here are some tips that might be of some help during cleanup:
1. carefully remove the diaper in such a way as to not spill contents onto floor. Had to be said since spillage can happen.
2. hold diaper by the ends and dump contents into toilet
3. wipe self with TP and flush this (repeat if necessary). for really big messes, you'll be flushing multiple times to avoid the toilet getting clogged.
4. immediately get into the shower. Using a removable shower head that you can hold helps get into the crevices of your under carriage easier. Crap gets stuck in the darndest places, I tell you what.....
The idea is to minimize contact with the messy stuff. Use latex gloves? In the event that you do touch it don't worry too much. It's not radioactive or anything, but you do want to clean things up. Wash thoroughly, use alcohol hand cleaner if you prefer. Not that it makes it ok, but there are people who do things with feces that would be cringe worthy they still survive. It's just crap, not industrial waste. That said, most of us would prefer to keep things as sanitary as possible and avoid those health risks.
Double bag dirty diapers and empty the trash frequently (daily?).
Oh, and for really hard stools that get bunched up in the diaper, they can get stuck in the toilet causing an over flow. Yowza! I've used a plunger before to break it up. Also used a plastic knife when nothing else worked. Gets to be more messy than just the diaper sometimes. icky details of a DL lifestyle.
Most of all: Have fun! It can be an interesting sensation be it the first time or the 50th time.