I've always wondered how those secret societies in colleges tell their newly-invited members that they're, well, invited. Apparently, it does not involve intrigue, mysterious symbols in blood on your dorm door, or general smoke and mirror tricks.
In fact, at Cornell, they "tap" you in the middle of the night. On your shoulder. While wearing swishy cloaks and doing a rendition of Harry Potter, or something.
Yeah, if someone mysteriously "tapped" me on a midnight stroll through campus, my first reaction would be to punch first and ask questions later. Shady, shady places, secret societies are, with their "tapping" and all.