I have a question about using a particular "punctuation" mark in dialogue. The mark in question is the "~".

So, for an example: "Katie has a crush~" The squiggly mark (who's real name escapes me) is being used to show a high-low or a low-high tonal fluctuation or shift within the preceding word, giving it kind of a teasing or whimsical tone to it.

I've seen one or two people doing this, and I was wondering what peoples' thoughts were. Is it too much of a shortcut? Or does it provide an easy way to keep the mood and pace of the dialogue without worrying about breaking it up with long descriptions of how the character is speaking, since it's hard to convey complex tones of voice using words?