Allow me to quote myself:
You could for instance use the washers to hang 400 kg of concrete from your ceiling. After all, you're dealing with construction material. That'll make it hard to steal.
With just one washer, and text only on one side, I'd just mount it somewhere. M14 might look a bit out of place because of the size, so don't use it to hang a painting, but for sure you won't accidentally lose it.
You're on to something there! If you're going to build it into something, you could use metal brackets instead of washers, and stamp the words into the side of the metal that goes into whatever you're building.
Or better yet, use door hinges. Holy crap! I think I love this idea.
Take the bathroom door off its hinges. Stamp the words into the side of the hinge that goes against the door and the door frame. Put the door back up.
Every single time you use that door, you'll smile. If anybody asks why, just tell 'em you had a truly exquisite bowel movement.