If I did a telepathy test on yahoo answers, would it work?

No

if you know how to do it, then yes

I believe it could, yes.

There’s only one way to find out. Go for it, I’ll be rooting for you. Count me in as a test subject.

absolutely

I’ve seen one person do it but never again after that.

It didn’t on Twitter:
http://www.newscientist.com/article/mg20227123.900-first-twitter-experiment-probes-belief-in-the-paranormal.html

It might, but you would have to have very carefully controlled protocols. How would you set it up? What would the controls be? Lastly, how would you separate the telepathy from the precognition?

I don’t think it would, but I say go for it anyway. Good luck.