Rules as written: I can make my own rules. Checkmate atheists.
Thumbs up for Garth Merenghi!
Granted, I'm already burnt out on 5e, but the idea of running it RAW is particularly unappetizing. Aside from shutting down a lot of creativity, a lot of the rules are straight-up busted or missing entirely.
I know DMs who think everything is better if it's homebrew and their games all suck.