The other day I was on Mystery Google, which is a great deal like regular Google in that you type in a search request and you are given pages that match the perimeters of the search. How it differs however, is what makes Mystery Google interesting: instead of getting the results for your search, you get the results of someone else's.
It was fairly interesting at first, typing in things like 'you've failed me for the last time', 'okapi' and 'Okie from Muskogee' and getting things like 'kilts' and 'adult sized onesies'. Then I got a phone number and a message that said 'Text for ur next mission.'
So I did.
From what I can tell this is not an uncommon occurrence, people put in their number and a message similar to the one I received and then wait for a response, they then text back a 'mission' for the replier to complete; such as dressing up like a ninja or serenading an acquaintance via phone.
While I find giving a stranger one's number dubious, leaving confusing lyrical messages on a Michigan teenager's phone is certainly an interesting waste of time.