So I followed Whoopie's Facebook Method, where you poke the HB and she pokes back.
But after the she pokes back,
I send:

Me: Hey you know its not safe to poke strangers! I guess your parents never taught you that!

but then she replies with:

HB: Whaaat? I never poked you .


IDK WHAT TO REPLY WITH?
EVEN THOUGH I KNOW SHE POKED ME

NEED ANY HELP I CAN GET.

She could be lying to mess with you. But either way maybe something like "well I guess your computer likes to poke strangers" or something playful like that. Or "well you must have two different personalities or funny friend because you definitely did "

Something like that. That's just me though, haven't tested it obviously.

it's a shit test, honestly I'd ignore it and just change the subject. You could try cocky funny too, maybe something like "Haha I have that affect on people... everyone especially girls are always so nervous and shy around me. it's okay we'll just tell everyone you didn't poke me " I don't really know which would be better though, it really depends on if your facebook profile is conguent with such a cocky funny type of line. What I mean is, are you cocky/funny on your wall and such as well? Does your wall dhv a lot? I think it's "safer" to ignore it but it's better if it works to go c/f