Most nights its not uncommon for me to 2-4 sets of racoon eyeballs reflecting back at me from the other side of the fence (within about ~50 ft) when I let the pooch out (he's been vaccinated). While it's not my idea of ideal, I have yet to see one in my back yard, tho I've seen one on out front, along with probably 50 deer over the years. I've talked with animal control and there very few documented cases of rabies in my area. That being said, I still respect that they are very tough little animal well equipped with sharp teeth and claws. I've seen an injured one (IIRC it had been hit by a car and needed to be put down) take a 12 gauge to the chest to be dispatched. It did NOT die instantly. Also vividly recall being at outdoor camp as a kid with an animal handler showing a racoon...I guess that day he didn't want to be part of the show and reminded her he wasn't a lost kitten. I've heard that if they get a dog near water they will drown it by climbing on its head and holding it under water (in addition to the slashing and biting).
I can understand your concern on the rabis thing, I'm no expert, but I think you have to touch saliva or blood/organs, etc. Not sure if a wet nose would be enough. Not something I would deliberately screw with tho either. The virus does die rather rapidly once the animal dies tho.
That being said, had it been me, I'd probably have tried to scoot it off the porch with a broom or something and if it went in the woods, I'd probably have let it go. I doubt I would have stoned it for being a curious critter...but that's just me. Now take that same scenario and make it a rattler or something, yes, for the safety of friends and family, I'd probably have to dispatch it. Not something I would want to do, but a risk I couldn't take considering the area (which fortunately doesn't have too many venomous critters). Tho the grandparents have rattlers on their property once in a blue moon, and yes, it will be a dead snake unfortunately.
You were lucky it wasn't a criminal looking for an easy mark, I am sure that 0560 on your lap would have been in his hand before you woke up, bad juju. However, there's probably only been about 10 zillion people who've taken a nap on their porch, hammock, or where ever. Unless you live in an high rate crime area, you're probably going to be ok. The other side of the coin is you can never be too careful, and situational awareness is a good thing to have. But it makes it very difficult to take a 'tactical' nap.
And FWIW, you think racoons act oblivious, try elk. I've had occasion where I've tried to get them to mosey on, and they looked at me like (insert Hanz & Franz voices here): Come on little girly man, you are but ~ 200 lbs and have no antlers (ie big, massive stabbing devices)...I will keeeelll you (Jeff Dunham)." They eventually went back in the woods when they were good and ready, because they decided to. Sorta like "Where do a grizzly crap in the woods?" Any where he darn well pleases.
YMMV,
BOSS