What is this phenomenon?

So there's this thing called Mystery Seeker (formerly known as Mystery Google) where people give complete and random strangers missions (such as going to a very public place and quacking like a duck). I have visited this site and encountered some very awkward situations.

One: Perverts asking for nude pictures via text messages.

Two: Complete strangers asking for dating advice.

Three: Complete strangers telling me to do weird things and then feeling compelled to do them.

Four: Being compelled to quack like a duck in public.

Now I have not actually done this quacking business, but knowing me I'll probably quack on accident and make an awkward fool out of myself as always. But the fact is, these things are happening to real people. This phenomenon of Mystery Seeker is making everyone awkward fools. This makes me feel like I'm not alone anymore...