What do you call the typographical symbols used in the picture?
We called these symbols #$%& as GRAWLIX. A grawlix is a sequence of typographical symbols used to represent a non-specific, profane word or phrase.
Grawlix is used in comics or cartoons to indicate swear words or vulgar words. So now, if you want to use swear words on someone without them knowing it, you might want to try grawlix. I bet this must be fun! 😀