Maintenance is the customers responsability, plain and simple, it's certainly not the first warranty claim denied due to improper/lack of maintenance. I can attest that they don't come with an owners manual but rather a quick start guide. The owners manual is online and it's over 750 pages. It would be like having a copy of War & Peace in your glove box.
When I have had a vehicle covered by a factory warranty it goes to that vehicles dealership for required maintenance. That way there is a record and they can't say improper oils or filters or whatever were used.