To me, this seems like a social game made by someone with a passing familiarity with BDSM hanky codes, and/or stoplight parties. Then again, it could also be an elaborate prank, too.
This meme has got to be pretty new or pretty low-key, as only one LJer lists greenlighting as an interest so far, but if you think about it, the idea does seem to be both viral and inevitable.... and prone to irresponsiblity and disaster too, a la Kids. Schools are no doubt going to crack down on such behavior, which could actually help to spread the meme.
So, if we're going to have such codes out there anyway, and if their growth and propagation via the Internet is inevitable, shouldn't we at least think a bit about how they should be designed? Why not design the codes so that they reflect safer sex practices?
What is needed is a simple, viral code that indicates :
1> The person in question has condoms, rubber gloves, or lube readily available.
2> A desire as to how they'd like them used (mutually, on themselves, on others.)
3> What their gender interest is. (same sex, opposite sex, bisexual)
4> The kind of behavior desired. (mutual masturbation, oral sex, penetrative sex...)
So, here's my challenge to you. How would you design a code that best meets the above criteria, while still being simple, viral, and, for lack of a better word, elegant? Is there a way to "build a better hanky"?