Can I use the invisible characters in an URL?

I recently discovered that ALT+255, also known as the invisible character, seemed to be usable in a website URL. Depending on the browser, it either shows up encoded as %C2, or looks like a space. Chrome and IE seemed to display it unencoded. It is really weird to see (something that looks like) spaces in URL's, but at the same time it is very human-readable.

However, my gut feeling tells me using this is a very bad idea. Is it?

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