1410
D or d come on
(i.imgur.com)
Welcome to Programmer Humor!
This is a place where you can post jokes, memes, humor, etc. related to programming!
For sharing awful code theres also Programming Horror.
If you did it would likely break something as it's one of only two characters not allowed in a file name (the other being null).
You can do a lot of funky stuff within the rules though, think about control characters, non-printing characters, newlines, homographs, emojis etc. and go forth and make your file system chaos!