[1,2,3].toString() === "1,2,3"

[].toString() === ""

It's only confusing to people who really don't know anything about the language.

this might be a better example

https://twitter.com/codinghorror/status/476826733576847360

Are you arguing that this is confusing to you and therefore not elegant, or are you arguing that this code compiles and that means it is not elegant?

Would you write that in production?